Apparatus for cultivating plants

ABSTRACT

An apparatus for cultivating plants may include a cabinet having a cultivation space; a door that opens and closes the cultivation space; at least one bed disposed in the cultivation space and on which plants are cultivated; at least one light assembly that radiates light for photosynthesis toward the at least one bed; a water tank that stores water to be supplied to the at least one bed; a machine compartment separated from the cultivation space at a lower portion in the cabinet, that communicates with an outside of the apparatus, and that accommodates a compressor and a condenser forming a cooling cycle for controlling a temperature of the cultivation space; an air duct that connects the machine compartment and the cultivation space and guides air in the machine compartment to the cultivation space; and a return duct that connects the cultivation space and the machine compartment and guides air in the cultivation space to the machine compartment.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority to Korean Patent Application No.10-2019-0018866, filed on Feb. 18, 2019 in Korea, the entire contents ofwhich is hereby incorporated by reference in its entirety.

BACKGROUND 1. Field

An apparatus for cultivating Eukaryote cells, for example, plants isdisclosed herein.

2. Background

In general, an apparatus for cultivating plants includes a predeterminedcultivating chamber having an environment appropriate to grow theplants, and the plants are stored in the predetermined cultivatingchamber. The apparatus for cultivating plants has components to supplynutrients and light energy required for plant growth, and the plants aregrown by the supplied nutrients and light energy.

An apparatus for cultivating plants according to the related art isdisclosed in Korean Patent Registration No. 10-1240375, which is herebyincorporated by reference. The related art discloses structure in whicha multi-stage tray is disposed inside a cabinet, light is irradiatedfrom a light irradiation unit to the tray, a nutrient solution issupplied to the tray through a nutrient solution recovery container, andan inner portion of the cabinet is maintained at a set or predeterminedtemperature by an air conditioning cycle and an air circulation fan.However, in the related art, there is no configuration for supplyingcarbon dioxide for photosynthesis of plants, so growth of plants is slowin a closed space.

A refrigerator type vegetable cultivation system for home use has beendisclosed in Korean Patent Application Publication No. 2013-0089393,which is hereby incorporated by reference, in which a shelf on whichplants are cultivated is disposed in a body, and which includes anutrient solution supplier that supplies nutrient solution to the shelf,an LED unit, and a carbon dioxide supplier that supplies carbon dioxide.However, in this structure, a separate device for supplying carbondioxide is installed. The device for supplying carbon dioxide has a tankstructure, so there is a very dangerous problem with respect to safety,such as explosions. Further, as a configuration for separately supplyingcarbon dioxide and a complicated channel structure are necessarilyrequired, there is a problem in that the structure is complicated andmanufacturing costs are increased.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments will be described in detail with reference to the followingdrawings in which like reference numerals refer to like elements and,wherein;

FIG. 1 is a perspective view of an apparatus for cultivating plantsaccording to an embodiment;

FIG. 2 is a perspective view of the apparatus for cultivating plants ofFIG. 1 , the door of which is open;

FIG. 3 is an exploded perspective view of the apparatus for cultivatingplants of FIG. 1 ;

FIG. 4 is an exploded perspective view of the cabinet which is onecomponent of the apparatus for cultivating plants according to anembodiment;

FIG. 5 is a longitudinal sectional view of the cabinet according to anembodiment;

FIG. 6 is an exploded perspective view of a water supply assembly whichis one component of the apparatus for cultivating plants according to anembodiment;

FIG. 7 is a cut-out perspective view of the apparatus for cultivatingplants having a water tank serving as one component;

FIG. 8 is a perspective view of the water tank, the cover of which isopen;

FIG. 9 is an exploded perspective view of the water tank according to anembodiment;

FIG. 10 is an enlarged view of portion A of FIG. 8 ;

FIG. 11 is a cut-out perspective view of a portion of FIG. 8 , takenalong line XI-XI;

FIG. 12 is a cut-out perspective view of a portion of FIG. 8 , takenalong line XII-XII;

FIG. 13 is a view illustrating a layout of water supply pipes inside thecabinet according to an embodiment;

FIG. 14 is a view illustrating that a bottom bed is mounted in FIG. 13 ;

FIG. 15 is a perspective view of the bed which is one component of theapparatus for cultivating plants according to an embodiment;

FIG. 16 is an exploded perspective view of the bed when the bed isviewed from the top;

FIG. 17 is an exploded perspective view of the bed when the bed isviewed from the bottom;

FIG. 18 is a perspective view of the bottom bed;

FIG. 19 is an exploded perspective view of a seed package seated on thebed according to an embodiment;

FIG. 20 is a plan view of a port which is one component of the seedpackage according to an embodiment;

FIG. 21 is a cross sectional view illustrating the seed package seatedon the bed;

FIG. 22 is a perspective view illustrating a bed bracket which is onecomponent of the bed according to an embodiment;

FIG. 23 is a bottom view of the bed when the bed is viewed from thebottom;

FIG. 24 is a cut-at perspective view of a portion of FIG. 23 , takenalong line XXIV-XXIV;

FIG. 25 is a cut-out perspective view illustrating the bottom bed iswithdrawn;

FIG. 26 is a perspective view of an introduction/withdrawal guide forintroducing or withdrawing the bed according to an embodiment;

FIG. 27 is a view illustrating that the bed is introduced;

FIG. 28 is a view illustrating that the bed is withdrawn;

FIG. 29 is a sectional view illustrating a state in which a lightassembly is mounted on the introduction/withdrawal guide;

FIG. 30 is a view illustrating a coupling structure of a light mount tomount the light assembly according to an embodiment;

FIG. 31 is an exploded perspective view of the light assembly whenviewed above;

FIG. 32 is an exploded perspective view of the light assembly whenviewed below;

FIG. 33 is a view illustrating the state in which a display assembly,which is one component of the apparatus for cultivating plants accordingto an embodiment, is mounted;

FIG. 34 is an exploded perspective view of the display assembly of FIG.33 ;

FIG. 35 is a view illustrating a state in which a blower assembly, whichis one component of the apparatus for cultivating plants according to anembodiment, is mounted;

FIG. 36 is an exploded perspective view of the light assembly whenviewed from the front;

FIG. 37 is an exploded perspective view of the light assembly whenviewed from the rear;

FIG. 38 is an exploded perspective view of the light assembly whenviewed from the rear;

FIG. 39 is a cut-out perspective view of portion of FIG. 38 , takenalong line XXXIX-XXXIX;

FIG. 40 is a sectional view illustrating an air circulation state in thecabinet;

FIG. 41 is an enlarged view of portion B in FIG. 40 ;

FIG. 42 is a perspective view of a machine compartment of the apparatusfor cultivating plants according to an embodiment;

FIG. 43 is a partial perspective view of the cabinet when viewed fromthe bottom;

FIG. 44 is a perspective view of a supply duct which is a component ofthe apparatus for cultivating plants according to an embodiment;

FIG. 45 is a plan view illustrating an arrangement of a supply duct anda return duct in the machine compartment according to an embodiment;

FIG. 46 is a view illustrating supply and discharge states of CO₂through the supply duct and the return duct;

FIG. 47 is a perspective view illustrating an internal structure of thebottom case, which is one component of the apparatus for cultivatingplants according to an embodiment;

FIG. 48 is a block diagram illustrating a flow of a control signal ofthe apparatus for cultivating plants according to an embodiment;

FIG. 49 is a view schematically illustrating an operating state of theapparatus for cultivating plants according to an embodiment; and

FIG. 50 is a view illustrating an internal structure of an apparatus forcultivating plants according to another embodiment.

DETAILED DESCRIPTION

Hereinafter, embodiments will be described with reference toaccompanying drawings. However, embodiments are not limited to thedisclosed embodiments suggesting the spirit. In addition, anotherembodiment falling within the scope may be easily suggested by adding,modifying, or deleting components.

FIG. 1 is a perspective view of an apparatus for cultivating Eukaryotecells, for example, plants according to an embodiment. FIG. 2 is aperspective view of the apparatus for cultivating plants of FIG. 1 , thedoor of which is open. FIG. 3 is an exploded perspective view of theapparatus for cultivating plants of FIG. 1 .

As illustrated in the drawings, the apparatus 1 for cultivatingEukaryote cells, for example, plants according to an embodiment may havean outer appearance formed by a cabinet 10 having an internal space inwhich plants may be cultivated and a door 20 to open/close the cabinet10. The cultivated plants may be plants, such as leaves or herbs thatare usually used for wrapping or salad, for example, that a user can eatand easily cultivate, and that do not occupy a lot of space.

The cabinet 10 may have a front surface which is open and may beprovided therein with an interior or cultivating space 11. The cabinet10 may be insulated. Accordingly, the cultivating space may maintain aset or predetermined temperature.

A plurality of beds 50 may be vertically arranged inside the cabinet 10.According to one embodiment, two beds 50 may be vertically provided andmay be referred to as an upper bed 50 and a lower bed 50, respectively,for convenience of explanation. In addition, at least two beds 50 may befurther included depending on a size of the cabinet 10.

Each bed 50 may have a structure in which a plurality of seed packages90 having seeds of plants and necessary food is seated. The bed 50 maybe referred to as a shelf or a tray. The seed package 90 may include asuitable combination of various types of seeds and food appropriate tothe seeds, and may be selected as a product that a user wants tocultivate. In addition, the bed 50 may have structure to seat the seedpackage 90 and maintain a seated state.

The bed 50 may have a fluid passage allowing water supplied from a watertank 40 to flow therethrough. The bed 50 may maintain a proper waterlevel to always supply water to the seed package 90.

An introduction/withdrawal guide 56 may be provided at opposite sidesurfaces of the cabinet 10. Opposite ends of the bed 50 may be supportedby the introduction/withdrawal guide 56 in a state in which the bed 50is seated on the introduction/withdrawal guide 56. The bed 50 may beintroduced/withdrawn into and from the cabinet 10 by theintroduction/withdrawal guide 56. The bed 50 may be introduced into orwithdrawn from the cultivating space 11. In the state in which the bed50 is withdrawn, the seed package 90 may be easily seated on the bed 50and managed.

The cabinet 10 may have a cooling cycle including a compressor 32, acondenser 33, and an evaporator 31. The internal temperature of thecultivating space 11 may be adjusted through the cooling cycle. In thiscase, the evaporator 31 may be disposed on an inner rear wall surface ofthe cabinet, and remaining components, such as the compressor 32 and thecondenser 33, may be disposed in a machine compartment 12 provided at arear lower portion of the cabinet 10. The machine compartment 12 may beseparated from the cultivating space 11, thereby preventing noise frombeing introduced, maintaining insulating of the cultivating space 11,and ensuring safety of a user.

The evaporator 31 may include a roll-bond type evaporator, which iscalled a heat exchanger. The evaporator 31 may have a plate structurewhich is easily attached to an inner rear wall surface of the cabinet10. In addition, the plate structure of the evaporator 31 may minimizeloss of the cultivating space 11. The evaporator 31 may be close to thecultivating space 11 to effectively adjust the temperature of thecultivating space 11.

In addition, a blower assembly 80 may be provided in front of theevaporator 31. A plurality of blower assemblies 80 may be providedvertically arranged and having a same structure and shape except formounting positions thereof. The blower assemblies 80 may be provided innumber corresponding to the number of beds 50 and may blow air forwardfrom a rear portion of the beds 50. Accordingly, air circulation may beindependently performed in each of internal spaces of the cultivatingspace 11 partitioned by the beds 50.

The internal air of the cultivating space 11 may be circulated by theblower assembly 80 and the circulated air may pass through theevaporator 31, so the cultivating space 11 may have a uniformtemperature throughout an inner entire portion thereof, and thetemperature may be rapidly adjusted. The air circulated by the blowerassembly 80 may flow while passing through and along a top surface ofthe bed 50 and a bottom surface of the light assembly 60.

The air flowing by the blower assembly 80 may allow the plants grownfrom the bed 50 to more smoothly breathe and to be properly shaken bypassing through the top surface of the bed 50, thereby adjusting stress.Accordingly, the blower assembly 80 may provide air flow optimized tothe growth of the plants. In addition, the air flowing by the blowerassembly 80 may prevent the light assembly 60 from being overheated bypassing through and along the bottom surface of the light assembly 60.

The light assembly 60 may be provided above the bed 50. The lightassembly 60 may irradiate the bed 50 with light to provide lightnecessary for the plants. An amount of light irradiated from the lightassembly 60 may be set to be similar to sunlight. The light assembly 60may be set with an amount of light and light irradiation time optimizedto plant cultivation.

The water tank 40 may be provided on an inner bottom surface of thecabinet 10. The water tank 40 may store water to be supplied to the bed50. The water tank 40 may be positioned under a bed 50 positioned at alowest portion of a plurality of beds 50 and a front surface of thewater tank 40 may be positioned at a position corresponding to a frontend of the bed 50.

A widthwise length of the water tank 40 may correspond to a width of theinner space of the cabinet 10. A vertical-direction length of the watertank 40 may be formed to correspond to a distance between the bed 50positioned at the lowest portion and a 11. In other words, the watertank 40 may occupy a space under the bed 50 positioned at the lowestportion and a space in front of the water tank 40 may be covered by thewater tank 40.

A water supply case 49 may be provided in the space covered by the watertank 40. The water supply case 49 may be provided therein with a pump494, a flow meter 495, and a water supply valve 496 describedhereinafter. The water supply case 49, internal components of the watersupply case 49, and pipes linked to components may be referred to as awater supply unit or a water supply assembly.

The water tank 40 may be mounted inside the cabinet 10 to be introducedor withdrawn in a frontward-backward direction and may have a separablestructure. Accordingly, the water tank 40 may have a structure to easilysupply water, be cleaned, and maintained.

A display assembly 70 may be provided at an open first half portion ofthe cabinet 10. The display assembly 70 may output an operating state ofthe apparatus 1 for cultivating plants to the outside. In addition, thedisplay assembly 70 may include an input unit to receive input by a usersuch that a whole operation of the apparatus 1 for cultivating plantsmay be set and input. For example, the display assembly 70 may include atouchscreen and may include structure, such as a button, or a switch,for example.

The display assembly 70 may be positioned on a same front plane as thefront end of the bed 50. The display assembly 70 may be positioned at afront end of the open front surface of the cabinet 10. The displayassembly 70 may be disposed significantly closely to a rear surface ofthe door 20, when the door 20 is closed.

The door 20 may be formed in a size to cover the open front surface ofthe cabinet 10. An upper hinge 211 and a lower hinge 212 may beshaft-coupled to an upper end and a lower end of one side of oppositeleft and right or lateral sides of the door 20. The door 20 may berotatably coupled to the cabinet 10 by the upper hinge 211 and the lowerhinge 212 and the cultivating space 11 may be open/closed due torotation of the door 20.

The door 20 may have a see-through structure in at least a portionthereof. Even when the door 20 is closed, the cultivating space 11 maybe viewed and checked.

The door 20 may include a door frame 22 to form a circumference of thedoor 20 with an opening formed at a center thereof, and a door panel 23to cover the opening of the door frame 22. The door panel 23 may beformed of glass or a transparent plastic material, for example, suchthat an inner portion of the apparatus 1 for cultivating plants isviewable therethrough. The door panel 23 may be colored, color-coated,or deposited with metal, or have a film attached thereto, for example,such that the cultivating space 11 may be selectively viewed or notviewed.

For example, when the light assembly 60 is turned on in a state in whichthe door 20 is closed, the inner portion of the cultivating space 11 maybe brightened such that the inner portion of the cultivating space 11 isviewed through the door panel 23. In contrast, when the light assembly60 is turned off in the state in which the door 20 is closed, the innerportion of the cultivating space 11 may be darkened such that thecultivating space 11 is not viewable due to the color or opticalcharacteristic of the door panel 23. Due to the above structure, theinner portion of the cultivating space 11 may be easily recognized evenin the state in which the door 20 is closed. Accordingly, a growingstate of the plants may be checked. In addition, an interior effect maybe exhibited. In addition, when it is unnecessary to view the innerportion of the cultivating space 11, a neat outer appearance may bemaintained.

When the light assembly 60 is turned on, the display assembly 70 may beviewed through the door panel 23. Accordingly, a user may recognizeinformation through the display assembly 70 in the state in which thedoor 20 is closed. In addition, even if the light assembly 60 is turnedoff, when the display assembly 70 is turned on to emit light, only thedisplay assembly 70 may be viewed through the door 20.

A plurality of door panels 23 may be disposed back and forth, and aninsulating space may be formed between the plurality of door panels 23.In addition, if necessary, the door panel 23 may include insulationglass. Accordingly, the inner portion of the cabinet 10 may be insulatedfrom the outside.

The door frame 22 may be provided at one side of a front surface thereofwith a door handle 221 to rotate the door 20. In addition, the doorframe 22 may be provided on a circumference of a rear surface thereofwith a gasket 222 to make air tightness between the cabinet 10 and thedoor 20. In addition, although not illustrated, the door 20 may have adoor heater to prevent dew from being condensed on the surface of thedoor 20.

The bottom surface of the cabinet 10 may be slightly spaced apart from aground surface on which the apparatus 1 for cultivating plants isinstalled. The cabinet 10 may be provided on the bottom surface thereofwith a bottom case 19. Electrical components, such as a door switch 195,an external temperature sensor 194, an external humidity sensor 184, anda communication unit 185 described hereinafter, which are disposedoutside the cabinet 10, may be received in the bottom case 19. Thebottom case 19 may be provided on the bottom surface of the cabinet 10and may be configured not to be exposed to the outside when the door 20is closed.

Hereinafter, structure of the cabinet 10 will be described withreference to accompanying drawings.

FIG. 4 is an exploded perspective view illustrating the cabinet which isone component of the apparatus for cultivating plants according to anembodiment. FIG. 5 is a longitudinal sectional view of the cabinetaccording to an embodiment.

As illustrated, the cabinet 10 may include an outer case 130 to form anouter appearance thereof and an inner case 140 to form the cultivatingspace 11. An insulating material 101 may be interposed between the outercase 130 and the inner case 140 to insulate the inner portion of thecabinet 10 from the outside.

The outer case 130 may be formed of a metal material, for example, andmay include at least one plate to form an outer surface of the cabinet10. For example, the outer case 130 may include outer side plates 131forming left and right or lateral side surfaces, an outer upper plate132 forming a top surface, an outer rear plate 134 forming a rearsurface, and an outer bottom plate 133 forming a bottom surface.

The outer bottom plate 133 may be bent such that the machine compartment12 is provided at a corner portion of a rear lower end of the cabinet10. Accordingly, the machine compartment 12 including the compressor 32,the condenser 33, a condenser fan 34, or a fan guide 341 may be providedin a space separate from the cultivating space 11. In addition, thebottom surface of the machine compartment 12 may be formed by a machinecompartment base 121. A rear surface of the machine compartment 12 maybe covered by a machine compartment grill (not illustrated).

A controller 18 may be provided on a rear surface of the cabinet 10,that is, a rear surface of the outer rear plate 134. The controller 18may be configured to control the overall operation of the apparatus 1for cultivating plants. The controller 18 may include a compressorprinted circuit board 181 additionally provided to control thecompressor 32.

The inner case 140 may include a metal material, for example, and mayinclude a plurality of plates defining the inside of the cabinet 10,that is, the cultivating space 11. In this case, at least a portion ofthe inner case 140 may be formed a plastic material, for example.

The inner case 140 may be formed of a metal material having excellentthermal conductivity performance similarly to aluminum. The inner case140 formed of the metal material may have excellent heat transferperformance such that the inner portion of the cultivating space 11 hasa more uniform temperature distribution when the cultivating space 11 isheated or cooled. In addition, the inner case 140 may be configured toreflect light irradiated from the light assembly 60. The lightirradiated from the light assembly 60 may be reflected from the surfaceof the inner case 140 of the metal material and uniformly irradiated toplants in the entire area of the bed 50, thereby resolving the problemof a shadow area to which the light is not irradiated. To this end,surface treatment, coating, or attachment of a film may be furtherperformed with respect to surfaces of the inner case 140 to improvereflective performance.

For example, the inner case 140 may include inner side plates 141forming opposite side surfaces, an inner upper plate 142 forming a topsurface, an inner rear plate 146 forming a rear surface, and an outerbottom plate 143, 144, 145 forming a bottom surface. The evaporator 31may be disposed on a front surface of the inner rear plate 146 and aheater 102 may be disposed on a rear surface of the inner rear plate146. Therefore, heating and cooling may be performed in the rear regionof the cultivation space.

The evaporator 31 may be interposed between the inner rear plate 146 andthe blower assembly 80 and may be cooled by refrigerant flowing due thedriving of the compressor 32. The cooled air may be circulated in thecultivating space 11 by the blower assembly 80 to uniformly cool thecultivating space 11.

The heater 102 may be disposed on the rear surface of the inner rearplate 146 and may be filled with the insulating material 101. The heater102 may be disposed in an area corresponding to the evaporator 31. Ahumid environment may be created inside the cultivating space 11 due tocontinuous moisture supply and the breathing of plants. The heater 102may be disposed on the rear surface of the inner rear plate 146 not tobe exposed to the inside of the cultivating space 11, for safety anddurability.

An area of the inner rear plate 146 may be heated by the driving of theheater 102. The heated air may be circulated inside the cultivatingspace 11 by the blower assembly 80 to uniformly heat the cultivatingspace 11. As the heater 102 is positioned in an area corresponding tothe evaporator 31, the heater 102 may be operated when the evaporator 31is frozen and used to defrost the evaporator 31.

The inner portion of the cultivating space 11 may be maintained at atemperature appropriate for growing plants (for example, 18° C.-28° C.)by the evaporator 31 and the heater 102. The internal temperature of thecultivating space 11 may be sensed by an internal temperature sensor 182and may be uniformly maintained regardless of the external temperatureof the cabinet 10.

The inner bottom plates 143, 144, and 145 may be formed in a shapecorresponding to the shape in which the outer bottom plate 133 is bent,and may be formed with the first bottom plate 143, the second bottomplate 144, and the third bottom plate 145 coupled to each other.

The first bottom plate 143 may have a return duct hole 143 a formedtherein for mounting a return duct 150. The return duct 150 maycommunicate with the machine compartment 12 to discharge the internalair of the cultivating space 11 to the machine compartment 12.

The return duct 150 may include a duct mount 151 mounted in the returnduct hole 143 a and a discharge pipe 152 that extends from a center ofthe duct mount 151 into the machine compartment 12 through an opening133 a of the outer bottom plate 133.

The duct mount 151 may be inclined toward the discharge pipe 152. Theduct mount 151 may be disposed adjacent to a lower portion of the innerrear plate 146 and a lower portion of the evaporator 31 to dischargewater to the machine compartment 12 when dew condenses inside thecultivating space 11. In this case, the machine compartment 12 may beprovided therein with a dry fan (not shown) to collect water dischargedthrough the return duct 150.

The machine compartment 12 may communicate with the cultivating space 11through a supply duct 17. Accordingly, carbon dioxide (CO₂) required forplant growth may be supplied from the machine compartment 12 to thecultivating space 11. In addition, the internal air in the cultivatingspace 11 may be discharged through the return duct 150. At least oneside of the supply duct 17 and the return duct 150 may have a structurecapable of opening and closing, and may be opened when carbon dioxide(CO₂) is supplied.

A decoration member 160 may be provided on the front surface of thecabinet 10. The decoration member 160 may connect a front end of theinner case 140 to a front end of the outer case 130 to form a frontouter appearance of the cabinet 10. The decoration member 160 mayinclude a decoration frame 161 formed along a circumference of an openfront surface of the cabinet 10 and an upper decoration portion 162 anda lower decoration portion 163 forming an upper end and a lower end ofthe front surface of the cabinet 10.

Regarding the arrangement in an inner lower space of the cabinet 10, asthe machine compartment 12 is disposed, a step 147 may be formed toprotrude inward from the bottom surface of the cultivating space 11. Inother words, the step 147 may protrude from a rear end portion of thebottom surface of the cultivating space 11. The step 147 may be formedhigher than a first half of the cultivating space 11 as the machinecompartment 12 is formed.

The rear portion of the bed 50 positioned at the lowest portion may beseated on a top surface of the step 147. The water tank 40 and the watersupply case 49 may be arranged in the frontward-rearward direction in aspace between the bottom surface of the bed 50 and the front portion ofthe step 147. In this case, heights of the water tank 40 and the watersupply case 49 may correspond to a height of the step 147. Therefore,when the bed 50 is seated, a stable mounting structure may be providedsuch that the bed 50 is in a horizontal state without interfering withnot only the step 147, but the water tank 40 and the water supply case49 in front of the step 147.

The bed 50 may be seated on the step 147 at the bottom surface of thecultivating space 11 and the water tank 40 and the water supply case 49may be positioned in the space provided between the bottom surface ofthe cultivating space 11 in front of the step 147 and the bed 50. Aheight for disposing the beds 50 in multiple stages may be ensuredthrough the above space structure, and the water tank 40 having asufficient capacity and a water supply assembly may be effectivelydisposed without loss of space.

A lower structure of the cabinet 10 will be described again withreference to FIG. 5 . The machine compartment 12 may be separated fromthe cultivating space 11 and the step 147 formed inside the cultivatingspace 11. The cabinet 10 may have the lower structure in which the watertank 40 and the water supply case 49 are subsequently disposed in frontof the step 147. Accordingly, the machine compartment 12, the water tank40, and the water supply assembly may be disposed and fully filled inthe space under the bed 50 positioned at the lowest portion, therebypreventing loss of the cultivating space 11. In addition, the water tank40 may be disposed adjacent to the open front surface of the cabinet 10to facilitate access by the user.

The water tank 40 may be disposed inside the cabinet 10 such that thewater tank 40 may be introduced or withdrawn by sliding for water supplyand service. In addition, as the water supply case 49 may be maintainedin a fixed state inside the cabinet 10, a connection pipe 492 providedin the water case 49 and a suction pipe 412 provided inside the watertank 40 may be selectively connected to or disconnected from each other.

Hereinafter, structure of the water supply assembly will be describedwith reference to drawings.

FIG. 6 is an exploded perspective of a water supply assembly which isone component of the apparatus for cultivating plants according to anembodiment. FIG. 7 is a cut-out perspective view of the apparatus forcultivating plants having the water tank serving as one component.

As illustrated in the drawings, the water supply case 49 may be formedin the shape of a box having an open rear surface. In addition, an innerspace 490 of the water supply case 49 may be provided to receive theconnection pipe 492, the pump 494, the flow meter 495, and the watersupply valve 496 therein.

A height of the water supply case 49 may be formed higher than orslightly lower than the height of the step 147 in a state in which thewater supply case 49 is mounted inside the cultivating space 11. Inaddition, the open rear surface of the water supply case 49 may becovered by the front surface of the step 147.

The water supply case 49 may include at a first side of a front surfacethereof a case hole 491 that communicates with the connection pipe 492.The case hole 491 may be formed at a position corresponding to an inletof the connection pipe 492. In addition, when the water tank 40 ismounted, the suction pipe 412 may be connected with the connection pipe492 through the case hole 491.

A tank switch 493 may be mounted on the first side of the front surfaceof the water supply case 49. The tank switch 493 may protrude toward thewater tank 40. As illustrated in FIG. 7 , when the water tank 40 ismounted, the tank switch 493 may be configured to be pressed by a rearsurface of the water tank 40.

Accordingly, the tank switch 493 may sense whether the water tank 40 isnormally mounted to supply water and may transmit the sensed result tothe controller 18. When the mounting signal of the water tank 40 is notinput by the tank switch 493, the pump 494 may not be operated. Inaddition, information on the water tank 40, which is not mounted, may bedisplayed on the display assembly 70 such that the user recognizes theinformation on the water tank 40.

A bracket 497 may be provided inside the water supply case 49. Thebracket 497 may allow the mounting of the pump 494, the flow meter 495,and the water supply valve 496.

The connection pipe 492 may be sequentially connected to the pump 494,the flow meter 495, and the water supply valve 496 through a pipe. Thewater in the water tank 40 may be supplied to the bed 50 through theflow meter 495 and the water supply valve 496, due to operation of thepump 494.

The flow meter 495 may sense a flow rate of water to be supplied, andprevent water from being excessively supplied to the bed 50 to overflow.A constant amount of water may be supplied by the flow meter 495 toadjust an amount of water to be supplied to the bed 50. Accordingly, anoptimized amount of water may be supplied to the bed 50 according to agrowing step of plants to prevent water from being excessively stored inthe bed 50. Accordingly, the bed 50 may be always maintained in a cleanstate and humidity in the bed 50 and the cultivating space 11 may beproperly maintained.

The water supply valve 496 may be opened when the pump 494 is drivensuch that water may be supplied to the bed 50. A plurality of watersupply valves 496 may be provided depending on the number of beds 50, orwater may be supplied to a plurality of beds 50 through a branch fromone water supply valve 496.

According to one embodiment, one water supply valve 496 may be branchedinto an upper fitting 496 a and a lower fitting 496 b, and an upperwater supply pipe 498 and a lower water supply pipe 497 may be connectedto the upper fitting 496 a and the lower fitting 496 b, respectively, tosupply water independently to the beds 50 (upper bed 50 and lower bed50) at upper and lower positions. Accordingly, mutually different watersupply environments may be provided to the beds 50 at the upper andlower positions, and an appropriate amount of water may be supplied tothe beds 50, respectively.

The water tank 40 may be disposed in front of the water supply case 49,and the tank switch 493 may be pressed in a state in which the watertank 40 is completely introduced. A top surface of the water tank 40 anda top surface of the water supply case 49 may have heights equal to orslightly lower than the top surface of the step 147.

Accordingly, when viewed from the front, a lower area of the lower bed50 may be completely covered by the water tank 40. In addition, thelower bed 50 and the top surface of the water tank 40 may be positionedsignificantly close to each other. Accordingly, a volume of the watertank 40 may be ensured and the water tank 40 and the lower bed 50 mayproduce a sense of unity. That is, as the front surface of the watertank 40 may be positioned on the same plane as the front surface of thelower bed 50, and may be vertically disposed adjacent to each other, thewater tank 40 and the lower bed 50 may produce a sense of unity.

Hereinafter, structure of the water tank 40 will be described withreference to accompanying drawings.

FIG. 8 is a perspective view of the water tank, the cover of which isopen. In addition, FIG. 9 is an exploded perspective view of the watertank according to an embodiment.

The water tank 40 may include a tank body 41 having a top surface opento receive water and a tank cover 42 to open and close the top surfaceof the tank body 41. The tank cover 42 may be pivotably coupled to thetank body 41 and the tank body 41 may be opened or closed by thepivoting of the tank cover 42. A cover engaging groove 426 and a coverengaging protrusion 413 may be formed at an upper end of the tank body41 and a first end of the tank cover 41.

At least a portion of the tank cover 42 may be transparent such that aninner portion 410 of the tank cover 42 may be viewed even when the tankcover 42 is closed. The tank cover 42 may include a cover frame 422having an opening at a center thereof and a cover plate 421 to cover theopening from a top surface of the cover frame 422. The cover plate 421may be transparent such that a water level inside the tank body 41 maybe viewed.

The cover engaging groove 426 may be formed in the first end of thecover frame 422, and a restricting protrusion 427 may be further formedon an opposite second side to the cover engaging groove 426 to maintainthe tank cover 42 to be closed. When the tank cover 42 is closed, therestricting protrusion 427 may be inserted into a restricting groove(not shown), which is formed in the upper end of the tank body 41, to berestricted.

A gasket groove 424 formed of rubber or silicon, for example, may beformed along a circumference of a bottom surface of the cover frame 422.A cover gasket 423 may be mounted in the gasket groove 424. The covergasket 423 may contact the upper end of the tank body 41 in a state inwhich the tank cover 42 is closed so that the water tank 40 is airtight.

The cover gasket 423 may be formed along the circumference of the coverframe 422. The cover gasket 423 may include a gasket mount 423 ainserted and fixed in the gasket groove 424 and an airtightness portion423 b extending downward from one side of the gasket mount 423 a. Theairtightness portion 423 b may be inserted into the open top surface ofthe tank body 41 and may closely contact an inner surface of the tankbody 41 to completely seal the inner portion of the tank body 41 withair tightness.

A frame rib 425 may be further formed on a bottom surface of the coverframe 422 to press the airtightness portion 423 b. The frame rib 425 mayextend downward from the bottom surface of the cover frame 422corresponding to the airtightness portion 423 b and may contact an upperend of the airtightness portion 423 b. Accordingly, in a state in whichthe tank cover 42 is closed, the frame rib 425 may press theairtightness portion 423 b to maintain the airtightness portion 423 b inclose contact with the tank body 41.

The suction pipe 412 may be provided inside the tank body 41. Thesuction pipe 412 may be provided at a position corresponding to theconnection pipe 492 and may extend to the inner portion 410 of the tankbody 41 by passing through a rear surface of the tank body 41.

The suction pipe 412 may include a horizontal portion 412 a and avertical portion 412 b. One end of the horizontal portion 412 a mayextend rearward through the rear surface of the tank body 41, that is,the surface facing a front surface of the water supply case 49. Thehorizontal portion 412 a may be formed in a size to be press-fitted intothe connection pipe 492.

The vertical portion 412 b may be positioned inside the tank body 41 andmay extend vertically downward from an end of the horizontal portion 412a passing through the rear surface of the tank body 41. The verticalportion 412 b may extend to a position adjacent to the bottom surface ofthe tank body 41. Therefore, the water contained inside of the tank body41 may flow into the connection pipe 492 through the vertical portion412 b and the horizontal portion 412 a.

A tank handle 411 may be provided to protrude forward from an upper endof the front surface of the tank body 41. The tank handle 411 may extendfrom a first lateral end portion of the tank body 41 to a second lateralend portion of the tank body 41, and have a bottom surface open suchthat a user may insert his or her hand into the bottom surface to pullout or push in the water tank 40, thereby withdrawing or introducing thewater tank 40. A front surface of the tank handle 411 may be positionedon a same plane as the front surface of the bed 50 and may be formed ofa material the same as or similar to a material of the bed 50 such thatthe tank handle 411 and the bed 50 produce a sense of unity.

A tank fixing portion 415 may be formed at a lower end of the rearsurface of the tank body 41. A pair of tank fixing portions 415 may beprovided at lateral sides, and the tank fixing portion 415 may beconfigured to be coupled to a protrusion provided on one side of theinner portion of the cabinet 10 when the water tank 40 is completelyintroduced.

The tank fixing portion 415 may include a pair of ribs rearwardlyextending, a distance between end portions of the ribs may be slightlynarrower than a distance between protrusions, and a distance betweenintermediate portions of the ribs may have a size corresponding to theprotrusions. When the water tank 40 is completely introduced, anentrance of the tank fixing portion 415 may be elastically deformedwhile expanding. The protrusion may be press-fitted into the recessedintermediate portion of the tank fixing portion 415. When the water tank40 is completely introduced as described above, the press-fitting of theprotrusion into the tank fixing portion 415 may be recognized through asound or press-fitting feeling.

Therefore, a connection state of the suction pipe 412 and the connectionpipe 492, which is not viewed when the water tank 40 is introduced asthe water tank 40 is disposed at a rear portion, may be recognizedthrough coupling of the tank fixing portion 415. In addition, the watertank 40 may be maintained in an exact and firm introduction state by thetank fixing portion 415.

Rail mounts 414 may be formed at lower end portions of lateral sidesurfaces of the tank body 41. The rail mount 414 may extend from a frontend portion to a rear end portion of the tank body 41 and provide aspace 414 a for mounting a tank rail 43 to withdraw or introduce thewater tank 40.

The rail mount 414 may be open downward. Accordingly, the tank body 41may have a structure of being seated from an upper portion to a lowerportion of the tank rails 43 disposed at opposite sides of the tank body41 and may be coupled to the tank rails 43.

The tank rail 43, which has a rail structure for multi-stage withdrawaland introduction, may have a compact structure. The tank rail 43 mayinclude an upper rail 431, a lower rail 432, and a middle rail 433connecting the upper rail 431 and the lower rail 432. The upper rail 431may be inserted into the rail mount 414 and fixed to the rail mount 414.Rail brackets 434, which are provided at the lower rail 432, may befixedly mounted on opposite sidewalls of the cultivating space 11. Themiddle rail 433 may be slidably coupled to the upper rail 431 and thelower rail 432 to connect the upper rail 431 to the lower rail 432.Accordingly, when a user holds the tank handle 411 and pulls forward orpushes the water tank 40, the tank rail 43 may slide to withdraw orintroduce the water tank 40. Thus, the tank body 41 may be configured tobe easily mounted and separated from the tank rail 43 without additionaltools or assembling or disassembling coupling members for cleaning ormanaging the tank body 41.

FIG. 10 is an enlarged view of portion A of FIG. 8 . FIG. 11 is acut-out perspective view of a portion of FIG. 8 , taken along lineXI-XI. FIG. 12 is a cut-out perspective view of a portion of FIG. 8 ,taken along line XII-XII.

As illustrated in the drawings, the tank rail 43 may be inserted intothe rail mount 414. A rear end portion of the rail mount 414 may beinserted into a rail restricting portion 435 protruding from a topsurface of the upper rail 431 such that the of the tank body 41 may befixed to the tank rail 43.

The rail restricting portion 435 may be formed by cutting out a portionof the upper rail 431. In addition, when the rear end portion of therail mount 414 is moved back and inserted as upper and front portionsare bent, a second half of the tank rail 43 and the rail mount 414 maybe restricted with respect to each other.

The tank rail 43 may be provided at a front end portion thereof with arail locker 44 to restrict a front end portion of the tank rail 43 inthe rail mount 414 and a locker fixing member 45 to mount the raillocker 44. The rail locker 44 may be coupled to the tank rail 43 andselectively coupled to or decoupled from the tank body 41 throughhandling of the user. Accordingly, the user may couple or decouple thetank body 41 to or from the tank rail 43 through the handling of therail locker 44.

The lock fixing member 45 may be inserted and mounted into the openfront end portion of the upper rail 431. In addition, a screw 453passing through a screw hole 436 formed in a top surface of the upperrail 431 may be coupled to the locker fixing member 45 such that thelocking fixing member 45 is fixed into the upper rail 431.

The locker fixing member 45 may include a plurality of coupling grooves452 for coupling the screw 453. A pair of screws 453 may not only couplethe locker fixing member 45, but couple the rail locker 44 to the topsurface of the upper rail 431.

As illustrated in FIG. 12 , the screw 453 at a rear portion may passthrough the screw hole 436 at the rear portion to be coupled to thecoupling groove 452 formed in the rear portion of the locker fixingmember 45, thereby coupling the upper rail 431 with the locker fixingmember 45. In addition, the screw 453 at a front portion may passthrough the rail locker 44 and the screw hole 436 at the front portionof the upper rail 431 and then be coupled to the coupling groove 452formed in the front portion of the locker fixing member 45, therebymaintaining a coupling state of the rail rocker 44, the upper rail 431,and the locker fixing member 45.

The rail locker 44, which extends forward from the top surface of theupper rail 431, may extend forward beyond the front end portion of theupper rail 431. In addition, a locker restricting portion 442 mayprotrude from the bottom surface of the rail locker 44 at the frontportion of the upper rail 431. The locker restricting portion 442 mayextend downward and protrude toward the front surface of the lockerfixing member 45.

The front end portion of the locker fixing member 45 may be exposedthrough the open front surface of the upper rail 431. In addition, alocker restricting groove 454 may be formed in the front surface of thelocker fixing member 45, and the locker restricting portion 442 may beselectively inserted into the locker restricting groove 454 to fix therail locker 44.

A locker restricting protrusion 443 may be formed to protrude in asideways direction from a side portion of the locker restricting portion442. In addition, the locker restricting protrusion 443 may be insertedinto a mount opening 414 b open in a side surface of the rail mount 414.In other words, in a state in which the locker restricting protrusion443 is inserted into the mount opening 414 b, a front end portion of thetank rail 43, that is, the front end portion of the upper rail 431 maybe fixed inside of the rail mount 414. As described above, the rear endportion and the front end portion of the tank rail 43 may be restrictedby the rail mount 414 and fixed. In particular, in the state in whichthe locker restricting protrusion 443 is inserted into the mount opening414 b, the locker restricting portion 442 is locked and restricted bythe locker restricting groove 454, so the tank rail 43 may be preventedfrom being easily separated from the rail mount 414.

The rail locker 44 may be formed of a plastic material, for example, andmay be formed with predetermined elasticity. In addition, the lockerrestricting protrusion 443 may be formed at an upper portion thereofwith an inclined surface 443 a. Accordingly, when the user lifts ahandle 441 of the rail locker 44, the locker restricting protrusion 443may be out of the mount opening 414 b by the inclined surface 443 a, andthe tank rail 43 may be separated from the rail mount 414. In such astate, when the tank body 41 is drawn forward, the rear portion of thetank rail 43 may be separated from the tank body 41.

As described above, as the water tank 40 is separated from the tank rail43, cleaning and service are possible and management is more easilyperformed. In addition, the tank rail 43 may be coupled to the railmount 414 again, and the water tank 40 may be introduced or withdrawn inthe state in which the tank rail 43 is coupled to the rail mount 414.

The water in the water tank 40 may be supplied to the bed 50 through thepump 494 and the water supply valve 496.

FIG. 13 is a view illustrating a layout of water supply pipes inside thecabinet according to an embodiment. FIG. 14 is a view illustrating thata bottom bed is mounted in FIG. 13 .

As illustrated in FIG. 14 , the upper water supply pipe 498 and thelower water supply pipe 497 may be connected to the water supply valve496 to supply water to the upper bed 50 and the lower bed 50,respectively. The upper water supply pipe 498 and the lower water supplypipe 497 may be provided independently from each other and may extendtoward the rear end portion of the bed 50, thereby supplying waternecessary for the growth of plants.

End portions of the upper water supply pipe 498 and the lower watersupply pipe 497 may be connected to the water supply valve 496 providedin the water supply case 49. The water supply valve 496 may include theupper fitting 496 a and the lower fitting 496 b independentlyconfigured. The upper water supply pipe 498 may be connected to theupper fitting 496 a, and the lower water supply pipe 497 may beconnected to the lower fitting 496 b.

To ensure the space of the water tank 10 and facilitate the fluidpassage arrangement, the connection pipe 492, the pump 494, the flowmeter 495, and the water supply valve 496 may be subsequently arrangedin a widthwise direction. The water supply valve 496 may be positionedat an outermost portion of the water supply case 49, and the upper watersupply pipe 498 and the lower water supply pipe 497 may be arranged topass through sidewall surfaces of the water supply case 49.

A water supply pipe guide 103 may be formed on an inner sidewall surfaceof the cabinet 10 adjacent to the water supply valve 496. The watersupply pipe guide 103 may be formed as one sidewall of opposite lateralsidewalls of the storage space, that is, the inner side plate 141 isrecessed or open.

The water supply pipe guide 103 may extend upward from one side adjacentto the water supply valve 496 and then may extend rearward along theupper end portion of the step 147. Accordingly, the upper water supplypipe 498 and the lower water supply pipe 497 connected to the watersupply valve 496 may be guided to a rear wall surface of the cultivatingspace 11, that is, a position of the inner rear plate 146 along asidewall of the cultivating space 11.

In order to mount the lower bed 50, the introduction/withdrawal guides56, which may be mounted on opposite side surfaces of the cultivatingspace 11, may be configured to cover a section, which is the watersupply pipe guide 103, extending in the frontward-rearward direction.Therefore, in the state in which the lower bed 50 is mounted, the watersupply pipe guide 103 is not exposed to the outside, thereby making amore neat outer appearance.

The upper water supply pipe 498 and the lower water supply pipe 497 maybe positioned in corner areas of the rear and side surfaces of thecultivating space 11. That is, the upper water supply pipe 498 and thelower water supply pipe 497 may be bent upward in a corner area in whichthe inner rear plate 146 and the inner side plate 141 are adjacent toeach other and may extend. The upper water supply pipe 498 may extend toa water supply portion 524 of the upper bed 50 and the lower watersupply pipe 497 may extend to a water supply portion 524 of the lowerbed 50, thereby supplying water to the upper bed 50 and the lower bed50.

The water supply pipes 497 and 498 are guided along the inner portion ofthe cultivating space 11 and easily placed. The water supply pipes 497and 498 extend upward along an edge area of the cultivating space 11 tominimize interference between internal components.

As the water supply pipes 497 and 498 are disposed at a position apartfrom a side of the evaporator 31 so as not to interfere with theevaporator 31 mounted on the front surface of the inner rear plate 146,water flowing along the water supply pipes 497 and 498 may be preventedfrom being frozen or excessively lowered in temperature due to thecooled air of the evaporator 31. In addition, the water supply pipes 497and 498 may have structures of being prevented from interfering with theinternal component of the cabinet 10, such as the evaporator 31, and offacilitating placement work.

The water supply pipes 497 and 498 may be formed of a metal pipe, suchas stainless steel, for example. Therefore, the water supply pipe 497and 498 may be sanitarily managed and may be maintained firmly in shape,thereby preventing the fluid passage from being deformed or bent andclogged. Accordingly, a reliable water supply is possible.

The water supply pipes 497 and 498 may extend upward through the watersupply portion 524 and then be bent toward the water supply portion 524.The outlets of the water supply pipes 497 and 498 may be formed to bedirected toward an inside of the water supply portion 524 from an upperportion adjacent to the water supply portion 524.

A water supply pipe holder 48 may be provided at a positioncorresponding to the water supply portion 524. The water supply pipeholder 48 may be formed of a plastic or rubber material, for example,and may be fixedly mounted on the inner rear plate 146. Water supplypipe holders 48 may fix the water supply pipes 497 and 498 such thatoutlets of the water supply pipes 497 and 498 are always directed towardthe inside of the water supply portion 524 at a set or predeterminedheight thereof.

The water supply pipe holder 48 may be formed in a semicircular shape,and may include a rounded portion 481 allowing the water supply pipes497 and 498 to pass therethrough along a rounded circumference of thewater supply pipe holder 48, The rounded portion 481 may correspond to abended shape of the water supply pipes 497 and 498, and a rear surfaceof the rounded portion 481 may be formed in an open or recessed shape toreceive the bent portions of the water supply pipes 497 and 498. Theoutlets of the water supply pipes 497 and 498 may extend furtherdownward through the rounded portion 481 to be closer to the watersupply portion 524.

A holder fixing hole 482 may be formed at a center of the water supplypipe holder 48 to receive, for example, a screw. The screw may passthrough the holder fixing hole 482 and may be fastened to the inner rearplate 146 such that the water supply pipe holder 48 may be maintained ina fixed state at a preset or predetermined position.

The water supply pipes 497 and 498 and the water supply pipe holder 48may be covered when the blower assembly 80 is mounted on the inner rearplate 146, and may not be exposed to the outside when the apparatus 1for cultivating plants is generally used.

The upper bed 50 and the lower bed 50 have the same water supplyingstructure except for vertical positions thereof. Water supplied to thewater supply portion 524 may be stored in a water collecting portion 523inside the bed 50 to provide moisture to the seed package 90 mounted onthe bed 50.

Hereinafter, structure of bed 50 will be described with reference to theaccompanying drawings. Although a plurality of beds 50 is provided, thebeds 50 may have the same structure except for mounting positionsthereof. Accordingly, the following description will be made withrespect to only one bed 50.

FIG. 15 is a perspective view illustrating the bed which is onecomponent of the apparatus for cultivating plants according to anembodiment. FIG. 16 is an exploded perspective view of the bed when thebed is viewed from the top. FIG. 17 is an exploded perspective view ofthe bed when the bed is viewed from the bottom. FIG. 18 is a perspectiveview of the bottom bed.

As illustrated in the drawings, the bed 50 may be formed in arectangular plate shape dividing the cabinet 10, and may be seated onguides 56 for withdrawal and introduction, which may be mounted onopposite side surfaces of the cabinet 10, such that the beds 50 arewithdrawn or introduced.

The bed 50 may include a bottom bed 52 to form a lower structure fortotally supplying water. The bottom bed 52 may form a whole shape of thebed 50 and may be formed of a plastic material, for example.

The bottom bed 52 may include bed flanges 522 that extend at a sideportion from opposite side end portions of the bottom bed 52. A bed side53 may be coupled to a bottom surface of the bed flange 522.

The bottom bed 52 may include a recess 521, and an upper bed 51 may beseated in the recess 521. The recess 521 may be provided in a shapecorresponding to the shape of the upper bed 51. In other words, therecess 521 may be formed at a position corresponding to a package seat511 formed in the upper bed 51, and may be recessed in the shapecorresponding to the package seat 511 such that the package seat 511 isstacked up the recess 521.

In addition, the bottom bed 52 may include the water supply portion 524and the water collecting portion 523 to store water supplied through thewater supply portion 524. The water stored in the water collectingportion 523 may be constantly supplied to the seed package 90.

The water collecting portion 523, which is positioned at the center ofthe bottom bed 52, may extend from a left or first side end portion ofthe bottom bed 52 to a right or second side end portion of the bottombed 52. In addition, the water collecting portion 523 may be recessed toa position lower than the recess 521 such that water may be stored onlyin the water collecting portion 523. The water collecting portion 523may be formed to have a predetermined width in the frontward-rearwarddirection such that all seat openings 512 formed in the upper bed 51 arereceived in the water collecting portion 523.

The water supply portion 524 may be formed at a corner of a rear endportion of the bottom bed 52. The water supply portion 524 may have ashape of protruding slightly rearward from the bottom bed 52, an opentop surface, and be recessed. Accordingly, the water supply portion 524may receive water from the water supply pipes 497 and 498 positionedabove. In addition, the water supply portion 524 may be positionedhigher than the water collecting portion 523 such that the waternaturally flows from the water supply portion 524 to the watercollecting portion 523.

A water guide 525 may be recessed and formed between the water supplyportion 524 and the water collecting portion 523. The water supplyportion 524 may be connected with the water collecting portion 523 bythe water guide 525. The water supplied to the water supply portion 524may flow to the water collecting portion 523 along the water guide 525.The water guide 525 may have a slope that declines toward the watercollecting portion 523 from the water supply portion 524. Accordingly,when water is supplied to the water supply portion 524, the water may benaturally supplied to the water collecting portion 523 along the waterguide 525.

The water collecting portion 523 may include a water sensor 526 to sensea water level. Accordingly, when it is necessary to supply water to theplants being cultivated, the water level of the water collecting portion523 or the existence of moisture may be identified through the watersensor 526 and then whether the water is supplied from the water tank 40to the bed 50 may be determined.

A pair of water sensors 526 may be provided, for example, and may bespaced apart from each other. The water sensor 526 may be disposed atopposite sides of the water collecting portion 523 to facilitate sensingof moisture and placement of a wire 544 for supplying power to the watersensor 526.

Sensor mounts 527 may be formed to be recessed to mount the watersensors 526 at front end portions of lateral sides of the recess 521formed at the center of the bottom bed 52. The sensor mounts 527 may berecessed in a same shape as a shape of the water sensor 526 and maylongitudinally extend in a vertical direction. In addition, the sensormount 527 may include in an upper end thereof a slot 527 a through whichthe water sensor 526 may pass.

The water sensor 526 may be formed of a metal material havingconductivity, for example, and may be formed in a bent plate shape suchthat the water sensor 526 may be mounted in the sensor mount 527 throughthe slot 527 a. A vertically extending portion 526 a, which extends inthe vertical direction, in the water sensor 526 may have a lower endextending to a bottom surface of the water collecting portion 523. Thewater sensor 526 may be configured such that a rear end portion of ahorizontally extending portion 526 b horizontally extending to thebottom bed 52 is exposed to the bottom surface of the bottom bed 52through the slot 527 a. The horizontally extending portion 526 b exposedto the bottom surface of the bottom bed 52 may be fixed and mounted tothe bottom bed 52 by, for example, a screw.

Power may be supplied to a pair of water sensors 526. When water ispresent in the water collecting portion 523, electricity may beconducted between the pair of water sensors 526. In addition, when wateris absent in the water collecting portion 523, electricity is notconducted between the pair of water sensors 526. In this case, the pump494 may be driven to supply water to the water collecting portion 523.In other words, the pair of water sensors 526 may serve as electrodesinside the water collecting portion 523, and whether to supply waterfrom the water tank 10 may be determined depending on conduction ofelectricity between the pair of water sensors 526.

The guides 56, which may be seated on lateral sides of the bottom bed52, may include the bed sides 53 to guide the withdrawal and theintroduction of the bed 50. The bed sides 53 may have a structure ofbeing coupled to opposite end portions of the bottom bed 52 afterseparately being molded. Alternatively, the bed sides 53 may be formedintegrally with the bottom bed 52 when the bottom bed 52 is molded.

A bed handle 520 may be formed on a front surface of the bottom bed 52.The bed handle 520 may have a structure in which a bottom surfacethereof is recessed such that the user holds the bed 50 when the bed 50is introduced or withdrawn. In addition, a front surface of the bedhandle 520 may be formed of the same material as a material of the tankhandle 411 or of a material having a same texture as the material of thetank handle 411 such that the bed handle 520 and the tank handle 411produce a sense of unity.

The upper bed 51 may be seated on a top surface of the bottom bed 52 andmay form an outer appearance of the top surface of the bed 50. The upperbed 51 may be formed of a metal pipe such as a stainless steel pipe, forexample, to form a neat outer appearance and to be sanitarily managed.

The upper bed 51 may be formed in a size to cover the recess 521 of thebottom bed 52 and may be formed in a plate shape. In addition, aplurality of package seats 511 may be formed in the upper bed 51 to seatthe seed package 920. The package seats 511 may be formed in a shapecorresponding to a shape of the seed package 920, and a plurality ofpackage seats 511 may be subsequently disposed. Accordingly, a pluralityof seed packages 90 may be disposed in the upper bed 51.

A plurality of package seats 511 may be disposed at each of a first halfand a second half of the center, and may be formed in equal size. Inaddition, a seat opening 512 may be formed in the package seat 511. Theseat opening 512 allows a portion of the seed package 90 to pass throughthe seat opening and to make contact with water collected in the bottombed 52.

At least one seat opening 512 may be formed in each package seat 511,One or more seat openings 512 may be formed depending on the structureof the seed package 90. In addition, the seat opening 512 may bepositioned in an area corresponding to the water collecting portion 523.When the upper bed 51 is seated in the bottom bed 52, the seat opening512 may be positioned on the water collecting portion 523 such that thewater stored in the water collecting portion 523 may be supplied to theseed package 90 through the seat opening 512.

According to an embodiment, the water collecting portion 523 may beprovided to extend in a widthwise direction at the center of the bottombed 52. Accordingly, the seat openings 512 may be formed to bepositioned closely to the center of the upper bed 51 such that the seatopenings 512 are positioned at an upper portion corresponding to aninner portion of the water collecting portion 523. The seat openings 512may be variously positioned depending on an arrangement and shape of thewater collecting portion 523.

A bed bracket 54 may be provided on the bottom surface of the bottom bed52. The bed bracket 54 may be positioned at a center of the second halfof the bottom bed 52. The bed bracket 54 may be positioned to cover thewater sensor 526 exposed to the bottom surface of the bottom bed 52 at alower portion. In addition, the bed bracket 54 may be fixedly mounted onthe bottom cover 55.

The bottom cover 55 may be formed in a plate shape, and may be bent tohave a bottom surface and a rear surface to cover the second half of thebottom bed 52 from below. In addition, the bed bracket 54 may be mountedon the bottom case 19.

The bottom cover 55 may be fixedly mounted on the inner case 140.Accordingly, the bottom cover 55 may be maintained in a fixed state evenwhen the bed 50 is withdrawn or introduced. In addition, when the bottombed 52 is introduced, it is possible to supply power to the water sensor526. In contrast, when the bottom bed 52 is withdrawn, it is impossibleto supply power to the water sensor 526.

FIG. 19 is an exploded perspective view of a seed package seated on thebed according to an embodiment. FIG. 20 is a plan view of a port whichis one component of the seed package according to an embodiment. FIG. 21is a cross sectional view illustrating the seed package seated on thebed.

As illustrated in the drawings, the seed package 90 seated on the upperbed 51 may include a medium 93 having a seed and a nutrient solutionprovided in a port 91 having a shape corresponding to the package seat511. The seed package 90 may be configured to include a nutrientsolution suitable for the plant being cultivated.

The seed package 90 may be configured according to types of plants thatmay be cultivated by the apparatus 1 for cultivating plants. In thiscase, the seed packages 90 having various types of plants have a samesize and may have a size set to be received in the package seat 511.Accordingly, the user may select the seed package 90 of the plant to becultivated and may seat the seed package 90 at a desired position on thebed 50 to start cultivating the plant.

The port 91 of the seed package 90, which is a container to form a space911 receiving the seed and the medium, has an open top surface and has asize and shape corresponding to a size and shape of the package seat511. In addition, a port protrusion 912 may be formed on a bottomsurface of the port 91 to have a shape corresponding to the seat opening512. The port protrusion 912 may pass through the seat opening 512 whenthe seed package 90 is seated in the package seat 511.

In addition, the port protrusion 912 may extend to the position in whicha lower end of the port protrusion 912 makes contact with or is adjacentto the bottom surface of the water collecting portion 523. In addition,a water inlet 913 may be formed in the bottom surface of the portprotrusion 912. An absorption sheet 92 may be provided inside the portprotrusion 912 to absorb water. The absorption sheet 92 may be formed ofvarious materials, such as non-woven fabric, felt, or sponge, forexample, to absorb water.

Accordingly, as illustrated in FIG. 21 , in a state in which the seedpackage 90 is seated in the package seat 511, the port protrusion 912 ispositioned inside the water collecting portion 523 having water. Inaddition, the water in the water collecting portion 523 may beintroduced through the water inlet 913 of the port protrusion 912 andmay be supplied into the port 91 through the absorption sheet 92. Thewater supplied into the port 91 may be mixed with the nutrient solutionof the medium 93, and may be supplied to the seed or the plants suchthat the seed or the plants are actively grown. In addition, packagecover 94 may be provided on an inner top surface of the port 91, thatis, a top surface of the medium 93 to protect the seed in the medium 93and the port 91.

The medium 93 may include the nutrient solution necessary for grow theplants and may be configured such that the plants are grown at a properspeed only when water is supplied without supplying additionalingredients. In addition, the nutrient solution may be present only in acartridge and only water supplied to the bed 50 inside the apparatus 1for cultivating plants. Accordingly, the apparatus 1 for cultivatingplants, especially, the water tank 40 and the water supply pipes 497 and498 may be basically prevented from being contaminated due to thenutrient solution. The inner portion of the apparatus 1 for cultivatingplants may be constantly maintained in a clean state due to the abovestructure. In addition, even under the environment that various types ofplants are cultivated, proper nutrients may be supplied.

To easily seat the seed package 90 and facilitate management and harvestof the plants grown on the bed 50, the bed 50 may have a structure thatthe bed 50 may be introduced or withdrawn. In the procedure that the bed50 is withdrawn, the water may be prevented from being supplied. Thewater has to be supplied after the water level is identified by thewater sensor 526 in the state in which the bed 50 is introduced. The bed50 may have a structure that power is selectively supplied to the watersensor 526 when the bed 50 is introduced or withdrawn.

Hereinafter, structure for supplying power to the water sensor 526 willbe described in more detail with reference to accompanying drawings.

FIG. 22 is a perspective view illustrating a bed bracket which is onecomponent of the bed according to an embodiment. FIG. 23 is a bottomview of the bed when the bed is viewed from the bottom. FIG. 24 is acut-out perspective view of a portion of FIG. 23 , taken along lineXXIV-XXIV. FIG. 25 is a cut-out perspective view illustrating the bottombed is withdrawn.

As illustrated in the drawings, the bed 50 has the structure of beingintroduced or withdrawn through the introduction/withdrawal guide 56disposed at opposite side portions of the bed 50, in a state in whichthe bed 50 is disposed in the apparatus 1 for cultivating plants. Inthis case, the bottom cover 55 which forms the bottom surface of therear portion of the bed 50 and the bed bracket 54 coupled to the bottomcover 55 are maintained in a state of being fixedly mounted on theinside of the cultivating space 11, and the bottom bed 52 and the upperbed 51 seated in the bottom bed 52 are introduced or withdrawn.

When the bottom bed 52 moves back and forth, the water sensor 526 may beselectively connected to or disconnected from a power terminal 543 ofthe bed bracket 54. Accordingly, in a state in which the bottom bed 52is completely introduced, power is supplied to the water sensor 526 suchthat sensing of water is activated. In contrast, in a state which thebottom bed 52 is withdrawn, it is impossible to supply power. Asdescribed above, water may be supplied to the bottom bed 52 depending ona state of the water sensor 526 and a sensing state of water by thewater sensor 526.

The bottom cover 55 may be formed in a shape of a plate including ametal material, corresponding to a width of the bed 50, and opposite endportions of the bottom case 55 may be fixedly mounted on the inner case140. In addition, the bottom cover 55 may cover a portion of the bottomsurface and the rear surface of the bottom bed 52 in a state in whichthe bottom cover 55 is mounted. The bottom cover 55 may include a bottomsurface 552 vertically bent and a rear surface 551. The bottom surface552 may cover the rear portion of the bottom surface of the bottom bed52 and the rear surface 551 may cover the rear surface of the bottom bed52.

The rear surface 551, which extends bi-directionally, may extend to thelower end portion of the blower assembly 80 positioned at an upperportion thereof. The extending upper end portion of the rear surface 551may be slightly spaced apart from a lower end portion of the blowerassembly 80. Flowing air is directed toward an inside of the blowerassembly 80 beyond the upper end portion of the rear surface 551 and thelower end portion of the blower assembly 80. In addition, the rearsurface 551 may cover the evaporator 31 disposed at a rear portionthereof such that the evaporator 31 is not exposed to the outside in astate in which the bottom bed 52 is withdrawn. The rear surface 551 maybe disposed adjacent to the lower end portion of the blower assembly 80to prevent the evaporator 31 from being exposed to the outside. The rearsurface 551 may cover the water supply pipes 497 and 498 provided on therear surface of the cultivating space 11 and another component, such asthe water supply pipe holder 48 provided in the inner rear plate 146such that the components are not exposed to the outside.

A rear surface opening 553 may be formed in one side of the rear surface551 corresponding to the water supply portion 524. The rear surfaceopening 553 may have a size corresponding to the water supply portion524. When the bed 50 is introduced, the water supply portion 524 may beinserted to pass through the rear surface opening 553. The actualsupplying of water to the water supply portion 524 may be performed in arear space of the rear surface 551. Accordingly, the water supply pipes497 and 498 may be prevented from being exposed and the water suppliedto the bed 50 may be prevented from being scattered around the bed 50.

The bottom surface 552 may extend from the rear end portion of thebottom bed 52 to the water collecting portion 523 and may extend to aposition to cover a portion of the water sensor 526. The bed bracket 54may be provided on the bottom surface 552. The bed bracket 54 may bepositioned between the bottom bed 52 and the bottom cover 55 and mayhave a power terminal selectively contacting the water sensor 526.

The bed bracket 54 may be formed, for example, by injection molding witha plastic material, may be formed in a plate shape, and may be mountedat a center of the bottom surface 552 of the bottom cover 55. A topsurface of the bed bracket 54 may be disposed to face a bottom surfaceof the bottom bed 52.

A pair of terminal mounts 541 protruding upward from opposite sides ofthe top surface of the bed bracket 54 may be positioned at positionscorresponding to horizontally extending portions 526 b. That is, theterminal mount 541 may be positioned vertically below the horizontallyextending portion 526 b in a state which the bottom bed 52 isintroduced. The terminal mount 541 may longitudinally extend in thefrontward-backward direction.

A terminal hole 541 a may be formed in a top surface of the terminalmount 541 and a portion of the power terminal 543 may be exposed throughthe terminal hole 541 a. The power terminal 543 may be fixedly mountedin an internal space of the terminal mount 541. The power terminal 543may include a contact 543 b bent to be inclined forward and backward anda fixing portion 543 a extending from one side of the contact 543 b andfixed to the inside of the terminal mount 541. The fixing portion 543 amay be fixed to the terminal mount 541 by, for example, a screw fastenedat a lower portion thereof and the contact 543 b may be configured toprotrude to the outside through the terminal hole 541 a. The end portionof the fixing portion 543 a may be connected with electric wire 544introduced into the terminal mount 541 to supply power.

A wire guide 542 may be interposed between a pair of the terminal mounts541. The wire guide 542 may be recessed in the bottom surface of the bedbracket 54 and provides a space in which the electric wire 544 may bereceived when the bed bracket 54 is coupled to the bottom cover 55. Inaddition, the wire guide 542 may connect both terminal mounts 541 and beconfigured to extend from the center of the bed bracket 54 to the rearend portion of the bed bracket 54. Therefore, electric wires 544connected to power terminals 543 disposed on both sides may extend tothe rear end portion of the bed bracket 54 along the wire guide 542.

The rear end portion of the wire guide 542 may further protrude to forma wire outlet 542 a. When the bed bracket 54 is mounted on the bottomcover 55, the wire outlet 42 a may pass through the rear surface 551,and the electric wires 544 may be connected with connectors 111, 112,and 113 on a rear wall surface of the cultivating space 11 without beingexposed to the outside.

In the state in which the bottom bed 52 is completely introduced, thewater sensor 526 may be in contact with the power terminal 543 asillustrated in FIG. 24 . In this case, the horizontally extendingportion 526 b of the water sensor 526 makes contact with the contact 543b of the power terminal 543. The contact 543 b may be maintained incontact with the water sensor 526 in the state in which the contact 543b is pressed.

In this state, power may be supplied to the water sensor 526, andoperation of the water sensor 526 may be activated. Accordingly, whenthe water is stored in the water collecting portion 523, the watersensors 526 at opposite sides may be electrically conducted to preventthe pump 494 from operating. In contrast, when the water is absent inthe water collecting portion 523 in the state in which the power issupplied to the water sensor 526, the water sensors 526 at oppositesides are electrically not conducted, and thus, the pump 494 and thewater supply valve 496 are driven, so water may be supplied to the bed50.

In addition, as illustrated in FIG. 25 , when a user withdraws the bed50, the bottom bed 52 is withdrawn in the state in which the bed bracket54 and the bottom cover 55 are fixed. At the moment when the bottom bed52 is withdrawn, the power terminal 543 and the water sensor 526 areseparated from each other, and power supply to the water sensor 526 iscut off. In other words, the power supply to the water sensor 526 isstopped from the moment when the bottom bed 52 is withdrawn. In thisstate, the pump 494 and the water supply valve 496 are forcibly stoppedso as not to operate. When the pump 494 is driven or the water supplyvalve 496 is opened in the state in which the bed 50 is withdrawn, watersupplied through the water supply pipes 497 and 498 may not be suppliedto the bed 50, but spilled. As described above, operation of the pump494 or the water supply valve 496 may be prevented by sensing thewithdrawn state of the bed 50.

An additional electric wire is not placed in the bottom bed 52 in whichthe water sensor 526 is provided, but rather, the electric wire 544 isplaced in the fixed bottom cover 55, thereby preventing the electricwires 544 from interfering with each other when the bottom bed 52 isintroduced or withdrawn, and smoothly introducing or withdrawing thebottom bed 52.

Opposite end portions of the bed 50 may be supported by theintroduction/withdrawal guides 56 provided on opposite side surfacesinside the cabinet 10, and the bottom bed 52 may slide along theintroduction/withdrawal guides 56 such that the introduction or thewithdrawal of the bottom bed 52 may be guided. Hereinafter, structure ofthe guide and the introduction and withdrawal structure of the bed 50will be described with reference to the drawings.

FIG. 26 is a perspective view of the introduction/withdrawal guide forintroducing or withdrawing the bed according to an embodiment. FIG. 27is a view illustrating that the bed is introduced. FIG. 28 is a viewillustrating that the bed is withdrawn.

As illustrated in the drawings, a pair of introduction/withdrawal guides56 may be provided at opposite side portions of the cabinet 10 tosupport opposite end portions of the bed 50. The introduction/withdrawalguides 56 may have the same structure and face each other. Theintroduction/withdrawal guide 56 may longitudinally extend in thefrontward-rearward direction such that the bed 50 has a predeterminedwithdrawal distance.

A guide groove 563 may be recessed in the introduction/withdrawal guide56 while extending in the frontward-rearward direction. The guide groove563 may receive a bed roller 531 mounted on a rear end portion of thebed side 53. The guide groove 563 may extend from the front end portionto the rear end portion of the introduction/withdrawal guide 56 suchthat the bed roller 531 moves along the guide groove 563. In this case,the bed roller 531 may move by rotating while making contact with aninner top surface 562 of the guide groove 563 and an inner bottomsurface 561 of the guide groove 563.

The top surface 562 of the front end portion of the guide groove 563 maybe inclined downward. Accordingly, when the bottom bed 52 is separatedand assembled, the bed roller 531 may be easily inserted. In addition, awithdrawal groove 562 a may be formed in one side of the top surface 562of the guide groove 563. The withdrawal groove 562 a may receive aportion of the bed roller 531 when the bottom bed 52 is withdrawn by aset or predetermined distance. Accordingly, when the bottom bed 52 iswithdrawn by the set or predetermined distance for facilitating work,the guide roller 564 may be received in the withdrawal groove 562 a. Insuch a state, as the bottom bed 52 is not easily moved in thefrontward-rearward direction, but maintained in the withdrawn state bythe set distance, a user may easily carry out jobs such as seating theseed package 90 or harvesting the plants.

A rear stopper 566 a may protrude from the rear end portion of the guidegroove 563. When the bottom bed 52 is completely introduced, the rearstopper 566 a supports the bed roller 531 such that the bed roller 531does not move further rearward any more. A buffer 566, which may beformed of an elastic material, such as rubber or urethane, may bemounted on the rear stopper 566 a to reduce impact when making contactwith the bed roller 531.

The introduction/withdrawal guide 56 may be formed at the rear endportion thereof with a guide protrusion 567 to protrude rearward, beinserted into an inner wall surface of the cultivating space 11, and berestricted. In addition, the guide groove 563 may be formed in the innerside surface thereof with a screw hole 565 coupled to a screw to fix theintroduction/withdrawal guide 56. Accordingly, theintroduction/withdrawal guide 56 may be firmly fixed and mounted to thesidewall of the cultivating space 11 through the guide protrusion 567and the coupling of the screw.

The guide roller 564 may be provided on the front end portion of theintroduction/withdrawal guide 56. The guide roller 564 may be positionedat a slightly lower portion from a center of the introduction/withdrawalguide 56 in a vertical direction, and may make contact with side rib 532formed on the bed side 53 such that the bottom bed 52 may be moresmoothly introduced or withdrawn.

The bed rollers 531 and the side ribs 532 may be formed on both sidesurfaces of the bottom bed 52, that is, the bed side 53. The bed roller531 may be rotatably mounted at the rear end portion of the bed side 53and rotated in a state of being received in the guide groove 563 tosmoothly withdraw the bottom bed 52.

The side ribs 532 may extend from a front of the bed roller 531 to afront end portion of the bed side 53. The side ribs 532 may protrude ina sideways or lateral direction from upper and lower central portions ofthe bed side 53 and allow the guide roller 564 to make contact with thebottom surface of the side ribs 532 to roll.

In other words, as illustrated in FIG. 28 , the bed roller 531 maycontact the guide groove 563 and the guide roller 564 may contact theside rib 532 when the bottom bed 52 is withdrawn. Therefore, the bottombed 52 may be withdrawn while maintaining a stable supported statewithout sagging or vertical flowing when the bottom bed 52 is withdrawn.

A rear restricting portion 533 formed to be inclined downward may beformed at a rear end of the side rib 532. The rear restricting portion533 may interfere with the guide roller 564 when the bottom bed 52 iscompletely withdrawn, such that the bottom bed 52 is not easilyreleased.

An introduction groove 534 may be formed in the first half of the siderib 532. The introduction groove 534 may be formed at a positioncorresponding to the guide roller 564 in a state that the bottom bed 52is completely introduced.

The introduction groove 534 may be formed to partially receive an upperportion of the guide roller 564. Accordingly, as illustrated in FIG. 27, the guide roller 564 is received in the introduction groove 534 in thestate in which the bottom bed 52 is completely introduced. Accordingly,the bottom bed 52 may not be arbitrarily withdrawn, but maintained inthe introduced state.

Through the above structure, the bottom bed 52 may stably maintain theintroduction state and the withdrawal state, and may be prevented frommoving due to external vibration or impact. In addition, when the userintroduces or withdraws the bottom bed 52, the user may smoothlyintroduce or withdraw the bottom bed 52 by the bed roller 531 and theguide roller 564.

The light assembly 60 to irradiate light toward the bed 50 may bemounted above the bed 50. Hereinafter, structure and a mountingstructure of the light assembly 60 will be described with reference tothe drawings.

FIG. 29 is a sectional view illustrating a state in which a lightassembly is mounted on the introduction/withdrawal guide. FIG. 30 is aview illustrating a coupling structure of a light mount to mount thelight assembly according to an embodiment.

The light assembly 60 may be disposed above the bed 50 and may irradiatelight upward from the bed 50. In addition, the light assembly 60 mayminimize loss of the cultivating space 11 and may have an arrangementstructure representing higher space utilization.

The light assembly 60 may be disposed at a top surface of thecultivating space 11 and a bottom surface of the bed 50 disposed above.In particular, the light assembly 60 may have the same structureregardless of a mounting position. Therefore, both the light assembly 60disposed above the bed 50 and the light assembly 60 disposed below thebed 50 may have the same mounting structure.

Hereinafter, description will be made with reference to the drawings.The light assembly 60 may be mounted on the inner surface of the cabinet10 and the introduction/withdrawal guide 56 by a light mount 64. Inother words, light assemblies 60 may be mounted at various positionsinside the cultivating space 11 using the same light mount 64.

The cabinet 10 may be formed in a top surface thereof with a cabinetcoupling hole 142 a to mount the light mount 64, and theintroduction/withdrawal guide 56 may be formed therein with a guidecoupling hole 561 a. The cabinet coupling hole 142 a and the guidecoupling hole 561 a may have a same shape except for the positionsthereof, so the light mounts 64 having the same structure may be mountedin the cabinet coupling hole 142 a and the guide coupling hole 561 a.

The cabinet coupling hole 142 a may be formed in the inner upper plate142 defining the top surface of the cultivating space 11. The cabinetcoupling holes 142 a may be provided in a first half and a second halfand left and right or lateral sides of the cultivating space 11, andfour cabinet coupling holes 142 a may be formed to stably fix fourcorners of a top surface of the light assembly 60.

The light mount 64 may include a mount coupling portion 641 engaged withthe cabinet coupling hole 142 a or the guide coupling hole 561 a and amount head 642 to restrict the light mount 64.

The mount coupling portion 641 may be formed in a shape of a thread andcoupled to the cabinet coupling hole 142 a or the guide coupling hole561 a in a screw scheme to firmly mount the light assembly 60. Inaddition, the mount coupling portion 641 may have a length longer than adepth of the cabinet coupling hole 142 a or the guide coupling hole 561a.

The mount head 642 may be formed at a lower end portion of the mountcoupling portion 641 and may be formed in a shape of a disc having apredetermined size. The mount head 642 may be formed corresponding to asize of an insertion portion 612 a of a case restricting hole 612 formedin the top surface of the light assembly 60. Accordingly, the mount head642 may be inserted into the case restricting hole 612 when the lightassembly 60 is mounted.

In a state in which the light mount 64 is coupled to the inner surfaceof the cabinet 10 or the introduction/withdrawal guide 56, the mounthead 642 may be spaced apart from the inner upper plate 142 and theintroduction/withdrawal guide 56 by a set or predetermined distance. Theset or predetermined distance may be formed corresponding to a thicknessof the light case 61 forming a top surface of the light assembly 60.

The case restricting hole 612 formed in the top surface of the lightcase 61 may include the insertion portion 612 a and a restrictionportion 612 b. The insertion portion 612 a is formed in size equal to orslightly larger than the mount head 642 such that the light assembly 60is inserted into the insertion portion 612 a.

The restriction portion 612 b may be formed in the shape of more beingfurther recessed forward from the front end portion of the insertionportion 612 a as illustrated in FIG. 31 . The restriction portion 612 bmay be formed in size slightly larger than a sectional surface of themount coupling portion 641 and smaller than a size of the insertionportion 612 a.

Accordingly, when the light case 61 is moved rearward in a state inwhich the mount head 642 is inserted into the insertion portion 612 a,the mount coupling portion 641 may be inserted into the restrictionportion 612 b. In this case, the mount head 642 restricts acircumference of the restriction portion 612 b. In other words, asillustrated in FIG. 29 , the circumference of the restriction portion612 b may be inserted into the space between the mount head 642 and theintroduction/withdrawal guide 56 and restricted. In contrast, when thelight case 61 is moved forward in the state in which the light case 61is mounted, the mount head 642 is moved toward the insertion portion 612a so it is possible to separate the light assembly 60.

The guide coupling holes 561 a may be formed in a first half and asecond half of the bottom surface of the introduction/withdrawal guide56. As the introduction/withdrawal guides 56 are provided at the lateralsides of the cultivating space 11, four light mounts 64 may be providedto fix four corners of the top surface of the light assembly 60.

As described above, the light mounts 64 having the same structure aremounted on the inner upper plate 142 and the introduction/withdrawalguide 56, respectively, so the light assemblies 60 having the samestructure may be mounted regardless of mounting positions thereof. Inother words, the light assemblies 60 having a single structure may bemounted at various positions.

The introduction/withdrawal guide 56 may be further provided dependingon the number of the beds 50 disposed in the cultivating space 11. Evenif a plurality of introduction/withdrawal guides 56 is verticallydisposed, the light mounts 64 are mounted in the respectiveintroduction/withdrawal guides 56 such that the light assembly 60 ismounted.

The light assembly 60 may include the light case 61 formed therein witha receiving space 611 and fixedly mounted by the light mount 64, a lightemitting device (LED) module 62 inside the light case 61, and a lightcover 63 to cover the light case 61.

Hereinafter, structure of the light assembly 60 will be described withreference to accompanying drawings.

FIG. 31 is an exploded perspective view of the light assembly whenviewed the light assembly from the top. FIG. 32 is an explodedperspective view of the light assembly when viewed from the bottom.

As illustrated in the drawings, the light assembly 60 may have a sizecorresponding to the top surface of the cultivating space 11 or the bed50. Accordingly, the light assembly 60 may uniformly irradiate light toan entire area of the bed 50 disposed below.

The light assembly 60 may include the light case 61 having an openbottom surface and receiving the LED module 62 therein. The light case61 may include a frame 613 formed in a shape of a rectangular plateshape and extending downward along the circumference of the light case61. A front surface 613 a of the frame 613 may be inclined. Accordingly,when the user opens the door 20, exposure of the light assembly 60 maybe minimized.

The light cover 63 may include in the top surface thereof with aplurality of case restricting holes 612. The case restriction holes 612,which may be coupled to the light mount 64, may be formed at fourcorners of the top surface of the light cover 63. In addition, whenpositions of the light mounts 64 coupled to the introduction/withdrawalguide 56 and the inner upper plate 142 are different from each other,case restriction holes 612 may be further formed at correspondingpositions for the coupling of all light mounts 64. Accordingly, asillustrated in FIG. 31 , eight case restriction holes may be formed. Inaddition, when positions of the light mounts 64 are the same, four caserestriction holes 612 may be formed.

The case restricting hole 612 may include the insertion portion 612 aformed in a size corresponding to the mount head 642 and the restrictionportion 612 b formed to be more recessed in front of the insertionportion 612 a. In this case, the restriction portion 612 b may be formedto be greater than a thickness of the mount coupling portion 641 and tobe less than a size of the mount head 642.

Accordingly, the light case 61 may be moved in the frontward-rearwarddirection in a state in which the mount head 642 is inserted into theinsertion portion 612 a, so the light assembly 60 may be mounted orseparated.

Wire guide ribs 614 may be formed at opposite sides under the lightcover 63 to guide wires connected with the LED module 62. The wire guiderib 614 longitudinally extends in the frontward-rearward direction and apair of wire guide ribs 614 may be disposed at each of lateral sides.The pair of the wire guide ribs 614 may be spaced apart from each other,and a plurality of wire coupling portions 615 may be formed in the spacebetween the wire guide ribs 614.

The wire guide ribs 614 and the wire coupling portions 615 may bedisposed at opposite side portions and be prevented from interferingwith the LED module 62 when the LED module 62 is mounted. In addition,the wire guide ribs 614 and the wire coupling portions 615 may beinterposed between the case restriction holes 612, and thus, beprevented from interfering with the light assembly 60 when the lightassembly 60 is mounted.

The wire coupling portion 615 may press and restrict the wires guidedalong the wire guide ribs 614, and be formed in a substantially ringshape to simultaneously surround a plurality of wires. The wire couplingportions 615 may be disposed in directions of facing each other atlateral sides. A plurality of wire coupling portions 614 may be formedat regular distances along the wire guide rib 614.

The LED module 62 may be mounted on the light case 61. The LED module 62may be configured such that a plurality of LEDs is mounted on asubstrate. The plurality of LEDs may be continuously arranged on thesubstrate at regular distances. The LED may be configured to have alight quantity (wavelength) similar to sunlight, and may be configuredto irradiate light of a color that may promote photosynthesis of theplant.

The LED module 62 may include a plurality of LED modules. For example,the LED module 62 may be arranged in the frontward-rearward direction asillustrated in FIG. 31 , or a plurality of the LED modules 62 may becontinuously arranged in a lateral direction as illustrated in FIG. 32 .In this case, the plurality of LED modules 62 may be configured toprovide different outputs, or may be configured to emit light ofdifferent outputs or different wavelengths depending on positions of thecultivated plants.

For example, the plants arranged at lateral sides of the bed 50 mayreceive less light as compared to the plants at a center of the bed 50.Accordingly, outputs of the LED modules 62 disposed at lateral sides maybe made higher than the outputs of the LED module 62 at the center, sothat the plants of the entire bed may uniformly receive light. Ifnecessary, spacing between or arrangement of the LEDs mounted on thesubstrate may be adjusted to uniformly irradiate light to all of thebeds 50.

The light cover 63 may be provided on the open bottom surface of thelight case 61. The light cover 63 may be configured to be mounted on thelight case 61 to cover the open bottom surface of the light case 61 andto protect the LED module 62 disposed inside. The light cover 63 may beformed of a transparent material such that light may be transmitted, anda coating or a surface treatment for diffusing light may be added to thebottom surface of the light cover 63.

A frame 632 may be formed around a bottom surface of the light cover 63to provide a space 631 in which the LED module 62 is received inside theframe 632. The frame 632 may be coupled to the light case 61 such thatan inner portion of the light case 61 is air tight. A wire outlet 632 amay be formed on a rear surface of the light cover 63. The wire outlet632 a, which may serve as a passage for introducing or withdrawinginternal wires of the light case 61, may be configured to be openrearward and to be directed to connectors 111, 112, and 113 on the rearwall surface of the cultivating space 11 such that the introduced orwithdrawn wires are not exposed.

A blower assembly mount 633 on which the blower assembly 80 may bemounted may be formed on opposite sides of a rear end of the light cover63. The blower assembly mount 633 may be recessed such that a blowerbracket 816 provided at opposite sides of an upper end portion of theblower assembly 80 may be inserted.

The display assembly 70 may be provided inside the cultivating space 11,and an operation state of the apparatus 1 for cultivating the plants maybe displayed to the outside through the display assembly 70.Hereinafter, the display assembly 70 will be described with reference tothe drawings.

FIG. 33 is a view illustrating a state in which a display assembly,which is one component of the apparatus 1 for cultivating plants, ismounted. FIG. 34 is an exploded perspective view of the display assemblyof FIG. 33 .

As illustrated in the drawing, the display assembly 70 may include adisplay case 71 forming an outer appearance, a display module 74received in an inner space 711 of the display case 71, and a rear cover75 that covers the open rear surface of the case 71.

The display case 71 may be provided in front of the light assembly 60.The display case 71 may be mounted on any one of remaining lightassemblies 60 except for the light assembly 60, which is mounted on thetop surface of the cultivating space 11, in a plurality of lightassemblies 60.

The display case 71 may be disposed at a front end portion of the lightassembly 60 and may be fixedly mounted on a front end portion of a topsurface of the light assembly 60. A lateral length of the display case71 may correspond to a lateral length of the light assembly 60 and mayextend from one end of the cultivating space 11 to an opposite end ofthe cultivating space 11. A vertical width of the display case 71 may beequal to or slightly greater than a thickness of the light assembly 60.Therefore, a front surface of the light assembly 60 may be obscured orblocked by the display assembly 70, and the light assembly 60 may not beexposed to the outside when viewed from the front.

A display opening 712 may be formed in a front surface of the displaycase 71. The display opening 712 allows information output from thedisplay module 74 to be viewed to the outside. A display sheet 73 may beprovided on the front surface of the display case 71. The display sheet73 may be formed of a transparent or translucent material such that anoutput screen of the display module 74 exposed through the displayopening 712 may be viewed.

A case mount 72 may be provided on lateral sides of a top surface of thedisplay case 71. The case mount 72 may extend rearward by apredetermined length. The case mount 72 may extend rearward and beseated on a top surface of the light case 61. A screw hole 721 may beformed in the case mount 72 and fixed to the top surface of the lightcase 61 by a screw 722 fastened to the screw hole 721.

The display module 74 may include a display 742 received inside thedisplay case 71 to output information and a substrate 741 on which thedisplay 742 is mounted. The display 742 may be a touch display having aninput manipulatable by a user. In addition, the display 742 may beexposed to the outside through the display opening 712. If necessary,the display case 71 may further include a button for a manipulationinput.

The rear cover 75 may be provided on the open rear surface of thedisplay case 71. The rear cover 75 may be formed with a module mount 751on which the display module 74 may be mounted. A support 752 protrudingforward may be formed around the module mount 751, and the support 752may be coupled to the display case 71.

A wire introduction/withdrawal port 753, through which a wire connectedto the display module 74 may be introduced or withdrawn, may be openedin opposite sides of an upper end portion of the module mount 751. Thewire passing through the wire introduction/withdrawal port 753 may beguided along with wires of the light assembly 60 through the light case61. The wire passing through the wire introduction/withdrawal port 753may be guided rearward through a space between the bed 50 and thedisplay assembly 70, if necessary.

The support 752 protruding rearward may be formed on a back surface ofthe module mount 751, The support 752 may protrude rearward to makecontact with a front surface of the light assembly 60. The support 752may have an inclined rear surface, and may have a slope corresponding toa slope of the inclined front surface of the light assembly 60.Therefore, when the display assembly 70 is mounted, the support 752 maybe completely in close contact with the front surface of the light case61 to maintain a stable mounting state.

FIG. 35 is a view illustrating a state in which a blower assembly, whichis one component of the apparatus 1 for cultivating plants, is mounted.As illustrated in the drawing, the evaporator 31 may be provided on arear wall surface of the cultivating space 11, that is, the inner rearplate 146, and the blower assembly 80 may be provided in front of theevaporator 31.

The blower assembly 80 may be configured to circulate air at the upperportion of the cultivating space 11 partitioned by the bed 50.Accordingly, blower assemblies 80 may be provided in a numbercorresponding to a number of the beds 50, and may be provided at thelower end of the light assembly 60 and the upper portion adjacent to thebed 50.

Each blower assembly 80 has a structure in which air is circulatedinside the cultivating space 11 such that the air heated or cooled bythe heater 102 or the evaporator 31 is discharged at the upper end andair is suctioned at a position adjacent to the top surface of the bed50. The heater 102 and the evaporator 31 may be disposed in anintermediate area of the inner rear plate 146 in the vertical directionand may at least partially overlap with the blower assemblies 80 at theupper portion and the lower portion. The air heated and cooled by theheater 102 and the evaporator 31 may be circulated by the blowerassembly 80 to uniformly cool or heat the entire partitioned spacesinside the cultivating space 11 using only one heater 102 and oneevaporator 31.

The blower assembly 80 may be spaced apart from the inner rear plate 146such that the cooled or heated air may be smoothly introduced and beconfigured not to interfere with the evaporator 31. In addition, theupper end portion of the blower assembly 80 may be configured to becoupled to the rear end portion of the bottom surface of the lightassembly 60.

The blower assembly 80 may cover components provided in the inner rearplate 146 in addition to the evaporator 31 in a state in which theblower assembly 80 is installed inside the cultivating space 11, therebypreventing the components from being exposed to the outside. However,FIG. 35 illustrates that a blower cover 84 forming the front surface ofthe blower assembly 80 is removed for explanation of an arrangementrelation between the evaporator 31 and the blower assembly 80.

The blower assembly 80 may longitudinally extend in a lengthwisedirection and may be configured corresponding to a length of the innerrear plate 146 in the lengthwise direction. In addition, air blown by ablowing fan 82 provided at the center portion is branched into the bothsides by a blower body 81 and may be discharged forward in a uniform airamount at an outlet side. Detailed structure of the blower assembly 80will be described hereinafter.

An outlet 171 of the supply duct 17 may be opened at a position lowerthan a lower portion of the inner rear plate 146, more specifically, theblower assembly 80 disposed hereinafter. The supply duct 17 maycommunicate with the machine compartment 12 to supply carbon dioxideinto the cultivating space 11.

The inner rear plate 146 may include a plurality of connectors 111, 112,and 113. The connectors 111, 112, and 113 may be configured to connectwires, which extend from the light assembly 60, the display assembly 70,and the blower assembly 80 in the cultivating space 11. Therefore, it ispossible to easily connect electrical components inside the cultivatingspace 11.

In addition, the second bottom plate 144 may further include a connector114 to connect electric wires extending from the pump 494, the flowmeter 495, and the water supply valve 496. The connector 114 may bedisposed inside the water supply case 49 and may be covered by the watersupply case 49.

Hereinafter, structure of the blower assembly 80 will be described withreference to the drawings.

FIG. 36 is an exploded perspective view of the blower assembly whenviewed from the front. FIG. 37 is an exploded perspective view of theblower assembly when viewed from the rear. FIG. 38 is a perspective viewof the blower assembly when viewed from the rear. FIG. 39 is aperspective view of a portion of FIG. 38 , taken along line XXXIX-XXXIX.

As illustrated in the drawing, the blower assembly 80 may include theblowing fan 82, the blower body 81 on which the blowing fan 82 may bemounted, and the blower cover 84 to cover a portion of the inner rearplate 146 including the blower body 81. The blowing fan 82 may be formedin a shape of a box fan and may be provided at a center of the blowerbody 81. The blowing fan 82 may discharge forward the air introducedfrom the rear portion of the blower assembly 80.

The blower body 81 may provide a space for mounting the blowing fan 82and may be configured to guide discharge of the air discharged by theblowing fan 82. The blower body 81 may be, for example, injection moldedwith a plastic material and a fan mount 811 may be formed at a center ofa rear surface of the blower body 81 to be recessed in a shapecorresponding to a shape of the blowing fan 82. An air hole 812 may beformed in the fan mount 811 so that air may be introduced into theblowing fan 82 when the blowing fan 82 rotates.

An air guide 813 may be formed on a front surface of the blower body 81to guide air discharged from the blowing fan 82 upward. The air guides813 may be provided on lateral sides of a center of the fan mount 811.

The air guides 813 may extend from a lower end portion of the fan mount811 toward opposite sides of the fan mount 811 and may have an inclinedsurface having a height gradually increasing in an extending direction.Therefore, air blown by the blowing fan 82 may flow along the inclinedsurface, and may be closer to a discharge port formed in an upper endportion of the blower body 81 toward the outside.

A rib 813 a extending upward may be further formed on a top surface ofthe air guide 813. The rib 813 a may extend upward from the air guide813 and may extend in a direction perpendicular to the upper end portionof the blower body 81. The ribs 813 a may be connected with an innersurface of the blower body 81 to reinforce the air guide 813 whileguiding the air flowing along the air guide 813 upward. Due to thestructure of the air guide 813 and the rib 813 a, the air dischargedfrom the air blowing fan 82 may be uniformly discharged from an entirearea of the discharge port of the blower body 81.

A discharge guide 815 may be formed at an upper end portion of a frontsurface of the blower body 81. The discharge guide 815 may guide the airdischarged by the blowing fan 82 to be discharged forward of the blowerbody 81. The discharge guide 815 may form a surface protruding furtherforward from a lower portion toward an upper portion. In other words,the discharge guide 815 may form an inclined surface or a roundedsurface, and guide the air flowing upward from below such that the airis directed forward. In this case, as the end portion of the dischargeguide 815 is adjacent to the bottom surface of the light assembly 60,the air discharged from the blower assembly 80 may flow forward from therear end portion of the bottom surface of the light assembly 60 by thedischarge guide 815. When the light assembly 60 emits heat, the lightassembly 60 may be cooled due to the air flow.

A connector hole 814 may be formed in one side portion of the blowerbody 81. Connector holes 814 may be formed at positions corresponding tothe connector 811 and 812 mounted on the inner rear plate 146.Accordingly, when the blower assembly 80 is mounted, the connectors 811and 812 may be inserted into the connector holes 814 so as not tointerfere with each other. The electric wire connected to the blowingfan 82 may be connected to the electric wire through the connector hole814.

The blowing fan 82 may be maintained to be fixed to the fan mount 811 bya fan fixing member 821 having a plate shape and mounted on the fanmount 811 and a screw 822 fastened to the blower body 81 through the fanfixing member 821.

A blower bracket 816 inserted into the blower assembly mount 633 may beprovided on lateral sides of the top surface of the blower body 81. Theblower bracket 816 may be formed in a vertically bent shape. One or afirst end of the blower bracket 816 may be coupled to the top surface ofthe blower body 81 and an opposite or a second end of the blower bracket816 may be mounted to the blower assembly mount 633 formed at a rear endof the bottom surface of the light assembly 60. Accordingly, the lightassembly 60 and the blower assembly 80 may be coupled to each other in amanner of crossing each other perpendicularly to each other. The blowerassembly 80 may discharge air forward from the rear end portion of thelight assembly 60.

Recessed spaces may be formed on opposite sides of the blower body 81. Arecessed space may be formed below the air guide 813. A first guideinsulator 831 and a second guide insulator 832 may be mounted in therecessed spaces. A guide recess 521 may be formed in one side of a rearsurface of the fan guide 341 and a third guide insulator 833 may bemounted in the guide recess 521. The cold air generated in theevaporator 31 may be prevented from being directly transmitted forwardthrough the blower assembly 80 by the first to third guide insulators831, 832, and 833.

The blower cover 84 may be provided in front of the blower body 81 tocover the blower body 81 and components mounted on the blower body 81.The blower cover 84 may form an outer appearance of a rear wall surfaceof the cultivating space 11 in a state in which the blower assembly 80is mounted.

The blower cover 84 may be formed of a same metal material as the innerside plate 141, and may be formed by bending a plate-shaped material.The blower cover 84 may have a rim 841 which may be bent along acircumference of the blower body 84. The blower body 84, in which theblowing fan 82 may be mounted, may be received in an inner space 842defined by the rim 841.

A top surface of the blower cover 84 may be open. The top surface of theblower cover 84 may be positioned at a position corresponding to anupper end portion of the blower body 81. Therefore, air discharged alongthe discharge guide 815 may be discharged through the top surface of theopen blower cover 84.

Opposite side surfaces of the blower cover 84 of the rim 841 may beformed to surround opposite side surfaces of the blower body 81. Theblower cover 84 may extend further downward than the blower body 81. Theblower cover 84 may extend to the top surface of the bed 50.Accordingly, when the blower assembly 80 is mounted, the rear wall ofthe space corresponding to the space between the light assembly 60 andthe bed 50 is formed. In addition, components mounted on the inner rearplate 146 may be covered to make a neat outer appearance.

A portion, which forms the bottom surface of the blower cover 84, of therim 84 may have an extending length shorter than opposite side surfacesof the rim 84. Accordingly, the bottom surface of the blower cover 84may be spaced apart from the inner rear plate 146 to form a space inwhich air is introduced downward. In other words, in a state in whichthe blower assembly 80 is mounted, a suction port through which air issuctioned may be formed on the bottom surface of the blower cover 84

An end portion of the rim 841 forming the bottom surface of the blowercover 84 may be bent downward to form a bending portion 841 a. Thebending portion 841 a may extend further downward from the rear portionof the bed 50. Accordingly, the lower end portion of the blower cover 84may not be exposed while the structure of the inner rear plate 146 iscovered, thereby making a neat outer appearance. The bending portion 841a may be spaced apart from the rear end portion of the bed 50 and theinner rear plate 146 to form air inlets for air to be introduced intothe blower cover 84.

Hereinafter, an air flowing state inside the cultivating space 11 in astate in which the blower assembly 80 having the above-describedstructure is mounted will be described again with reference to thedrawings.

FIG. 40 is a sectional view illustrating an air circulation state in thecabinet. FIG. 41 is an enlarged view of portion B in FIG. 40 .

As illustrated in the drawings, the internal temperature of thecultivating space 11 may be sensed by an internal temperature sensor182, and the set temperature of the cultivating space 11 may bemaintained depending on the operation of the heater 102 or theevaporator 31. In addition, the air in the cultivating space 11 may becirculated by driving of the air blowing fan 82 and may be heated orcooled by the heater 102 or the evaporator 31, thereby maintaining awhole temperature of the cultivating space 11 at a uniform temperature.

When the blowing fan 82 is driven, air in the cultivating space 11 flowsto the rear end portion of the bed 50 while flowing along the topsurface of the bed 50. In this process, plants growing in the bed 50 maybe shaken by the flowing air, and plant growth may be promoted by thisaction. The air blowing fan 82 may maintain a predetermined air flowrate, and periodically vary the air flow rate according to occasions toapply appropriate stress to the plants, thereby allowing the plants togrow more rapidly or improve a growth state.

The air flowing to the rear end portion of the bed 50 may be introducedinto the blower cover 84 through a space between the lower end portionof the blower cover 84 and the rear end portion of the bed 50. In thiscase, the shape of the bent portion 841 a at the lower end portion ofthe blower cover 84 may prevent the space, in which the air in thecultivating space 11 is suctioned, from being exposed while smoothlyintroducing air.

The air introduced into the blower cover 84 flows upward and is directedto the blowing fan 82. In this process, the flowing air may be cooledwhile passing through the evaporator 31 or may be heated by the heater102. The air in the cooled or heated state is forced to flow forward bythe blowing fan 82. The air flowing forward is directed upward whileflowing to opposite side surfaces by the air guide 813. In this case,the air discharged is uniformly directed to the discharge guide 815 bythe inclination of the air guide 813 and rib 813 a. More specifically, adistance between the air guide 813 and the discharge guide 815 isincreased at a position close to the air blowing fan 82, so the rapidlyflowing air flows a longer distance. The distance between the air guide813 and the discharge guide 815 is shorter as the air guide 813 and thedischarge guide 815 are further apart from the air blowing fan 82, sothe air flowing more slowly flows a short distance. Accordingly, the airdischarged through the discharge guide 815 may be discharged at aconstant flow rate in the entire area.

The air discharged through the discharge guide 815 may flow forwardalong a bottom surface of the light assembly 60, that is, along thelight cover 63. In this case, the air flowing along the light cover 63may lower the heat generated in the operation of the light assembly 60.

The air that flowing forward along the bottom surface of the lightassembly 60 may flow to the first half of the cultivating space 11, flowdownward, then flow rearward along the bed 50, and then flow into theblower cover 84. The entire cultivating space 11 may be uniformly heatedand the cultivating space 11 may be maintained at a constanttemperature, by continuously circulating the air, so an optimumcondition for growing the plants inside the bed 50 may be created.

CO₂ may be indispensably required to actively maintain photosynthesis ofplants disposed in the cultivating space 11, A supply duct 17 and areturn duct 150 to connect the machine compartment 12 and the innerportion of the cultivating space 11 may be further provided tocontinuously supply CO₂ to the cultivating space 11.

Hereinafter, structure of the supply duct 17 and the return duct 150will be described with reference to the drawings.

FIG. 42 is an open perspective view of a machine compartment of theapparatus 1 for cultivating plants. FIG. 43 is a partial perspectiveview of the cabinet when viewed from the bottom.

As illustrated in the drawings, the machine compartment 12 is opentoward the rear portion of the cabinet 10, and a bottom surface of themachine compartment 12 may be formed by a machine compartment base 121.The compressor 32 and a condenser 33 constituting a cooling cycle may bemounted on the machine compartment base 121. Fan guide 341 may befurther provided between the compressor 32 and the condenser 33 and acondenser fan 34 may be provided in the fan guide 341.

External air is suctioned into the condenser 33 as the condenser fan 34is driven and then flows to the compressor 32 through the condenser fan34. The condenser fan 34 may force the air flow inside the machinecompartment 12 to allow cooling or heat exchange of the condenser 33 andthe compressor 32.

The supply duct 17 communicating with the cultivating space 11 mayextend to a position adjacent to the condenser fan 34. In this case, thesupply duct 17 may extend downward to a space, in which the compressor32 is disposed, of a space defined by the fan guide 341. Inparticularly, an open lower end portion of the supply duct 17 may beformed toward the condenser fan 34. Accordingly, a separate fan is notrequired for the supply of CO₂ and the air in the machine compartment 12may flow into an inlet of the supply duct 17 when the condenser fan 34rotates. The air in the machine compartment 12 may flow into thecultivating space 11 through the supply duct 17.

One side of the return duct 150 spaced away from the supply duct 17 mayextend downward. The discharge pipe 152 of the return duct 150 mayextend to a blade area of the condenser fan 34. The open lower endportion 152 a of the discharge pipe 152 may be formed to face downward.Therefore, air forcedly blown by the condenser fan 34 rapidly passesthrough an opening of the discharge pipe 152. Therefore, negativepressure may be formed on an open bottom surface of the discharge pipe152, and internal air of the cultivating space 11 may be introduced intothe return duct 150 and discharged to the machine compartment 12.

The air of the machine compartment 12 may be supplied through the supplyduct 17 to the cultivating space 11 by rotation of the condenser fan 34and forcibly supplied into the cultivating space 11, so CO₂ may besupplied into the cultivating space 11. Plants in the cultivating space11 may perform photosynthesis using the supplied CO₂.

The air in the cultivating space 11 may be discharged into the machinecompartment 12 by the return duct 150. The forced air flow through thesupply duct 17 and the return duct 150 enables continuous supply of CO₂to the cultivating space 11. An amount of air flowing into thecultivating space 11 from the machine compartment 12 may be adjustedaccording to a kind of a plant to be cultivated and an amount of CO₂supplied in a growing stage.

Although not illustrated, a filter may be provided in the supply duct 17or the return duct 150. The filter may prevent dust from entering theinside of the machine compartment 12 or the inside of the cultivatingspace 11 when the air is introduced, if necessary. In addition, ifnecessary, an opening/closing mechanism, such as a damper, which isopened only in one direction, may be provided in the supply duct 17 andthe return duct 150. Only if necessary, the opening/closing mechanismmay be opened to adjust the supply amount of CO₂.

FIG. 44 is a perspective view of a supply duct which is a component ofthe apparatus 1 for cultivating plants according to an embodiment.Hereinafter, structure of the supply duct 17 will be described.

The supply duct 17 may longitudinally extend in the vertical direction,and an outlet 171 for discharging air may be formed at an upper endportion of the supply duct 17 and an inlet 175 for introducing air maybe formed at a lower portion of the supply duct 17. The inlet 175 andthe outlet 171 may face in mutually different directions. In otherwords, the inlet 175 may be disposed to face the condenser fan 34, andthe outlet 171 may be formed to face the rear wall surface of thecultivating space 11.

A flange 172 may be formed around the outlet 171. The flange 172 may bebent outward around the outlet 171 and may be fixed in contact with theinner rear plate 146.

The supply duct 17 may include a duct upper portion 173, and a ductlower portion 174. The duct upper portion 173, which may be bentdownward from the outlet of the supply duct 17, may be formed in anelliptical shape in cross section. A diameter in the frontward-rearwarddirection may be formed to be significantly smaller than a diameter inthe lateral direction. This structure allows the upper portion of thesupply duct 17 to be disposed in a space between the outer case 130 andthe inner case 140 where the upper portion of the supply duct 17 isrelatively narrow. Although the diameter in the frontward-rearwarddirection is formed to be smaller, the outlet 171 and the inlet 175 havea same sectional area, so the air passing through the supply duct 17smoothly flows.

The duct lower portion 174 may extend from a lower end portion of theduct upper portion 173 to the inlet 175. As the duct lower portion 174is positioned in an inner region of the machine compartment 12, the ductlower portion 174 is relatively free from restriction on thickness. Inorder to allow the air blown by the condenser fan 34 to flow moresmoothly into the supply duct 17 through the inlet 175, the inlet 175may be formed in a substantially circle shape as compared to a sectionalshape of the duct upper portion 173. A duct connecting portion 176 maybe further formed between the duct upper portion 173 and the duct lowerportion 174 to naturally connect the duct upper portion 173 and the ductlower portion 174.

Hereinafter, an air flow path for supplying CO₂ will be described withreference to the drawings.

FIG. 45 is a plan view illustrating an arrangement of the supply ductand the return duct in the machine compartment. FIG. 46 is a viewillustrating supply and discharge states of CO₂ through the supply ductand the return duct.

As illustrated in the drawing, the inlet 175 of the supply duct 17 maybe positioned substantially adjacent to one side of the fan guide 341.An open surface of the inlet 175 may be formed to face blades of theblowing fan 82 and be arranged to be parallel to a front surface of thecondenser fan 34 (a surface crossing a rotation axis of the condenserfan).

Therefore, when the condenser fan 34 is rotated, air forcedly blown bythe condenser fan 34 may be effectively introduced into the inlet of thesupply duct 17. In this case, a frontward-rearward direction width D2 ofthe duct lower portion 174 may be larger than a frontward-rearwarddirection width D1 of the duct upper portion 173. The air flowing intothe duct lower portion 174 may flow upward and flow into the duct upperportion 173. The air may flow through the duct upper portion 173 to therear portion of the blower assembly 80 through the outlet 171.

In this case, the frontward-rearward direction width of the duct upperportion 173 is relatively smaller than that of the duct lower portion174, but cross sectional areas of the duct upper portion 173 and theduct lower portion 174 are the same, so loss of an amount of air is notcaused.

The air of the machine compartment 12 flowing into the rear portion ofthe blower assembly 80 may include CO₂ and may be uniformly suppliedinto the cultivating space 11 by the blower assembly 80. The CO₂introduced into the cultivating space 11 may be involved inphotosynthesis of the cultivated plants. The CO₂ may be used forphotosynthesis and the air in the cultivating space 11 having less CO₂may be directed to the machine compartment 12 through the return duct150.

In this case, the outlet of the return duct may be opened downward, sothe air blown by the condenser fan 34 may pass over the outlet 171 ofthe return duct 150. Accordingly, negative pressure may be formed at theoutlet of the return duct 150, and the air in the cultivating space 11may be introduced into the machine compartment 12.

The return duct 150 may be formed such that a duct mount 151 formed atthe upper portion of the return duct 150 has a slope and a wider area.When defrost water is generated, the defrost water may be discharged tothe machine compartment 12 through the duct mount 151 and the dischargepipe 152.

A bottom cover 55 may be provided on a bottom surface of the cabinet 10to receive electrical components. Hereinafter, structure of the bottomcase 19 will be described with reference to the drawings.

FIG. 47 is a perspective view illustrating an internal structure of thebottom case, which is one component of the apparatus 1 for cultivatingplants. As illustrated in the drawing, the bottom case 19 may have anopen top surface, and may be disposed such that the open top surfacefaces the bottom surface of the cabinet 10. The bottom case 19 may bepositioned between the cabinet 10 and a ground surface on which theapparatus 1 for cultivating plants is disposed. The bottom case 19 andelectronic components inside the bottom case 19 are not exposed to theoutside when viewed from above the apparatus 1 for cultivating plants.

The bottom case 19 may have a frame formed along a circumference of thebottom surface in a plane shape. In addition, the bottom case 19 has aninner space 190 in which electrical components provided in the bottomcase 19 are received.

A door switch 195 may be provided in the inner space 190 of the bottomcase 19 to sense opening/closing of the door 20. In addition, acommunication unit 185 to communicate with an external device may beformed in the bottom case 19. The communication unit 185 may beconfigured to perform various wireless communications, such as Wi-Fi,ZigBee, NFC, and Bluetooth, to transmit operating information of theapparatus 1 for cultivating plants through a cell phone and/or acomputer of a user, to receive a command, and to store and process userinformation, An external temperature sensor 194 is provided inside thebottom case 19 to sense an outdoor temperature. An external humiditysensor 184 may be further included in the bottom case 19 and an internalhumidity sensor 183 may be provided in the cultivating space 11.

A wire guide 192 may extend laterally at one side of the bottom case 19.The wire guide 192 may have an open upper portion to receive wire 195 aconnected to the door switch 195, the external temperature sensor 194,and the communication unit 185 and may communicate with the space inwhich the electronic components are received.

Hereinafter, operation of the apparatus 1 for cultivating plants havingthe above structure according to an embodiment will be described.

FIG. 48 is a block diagram illustrating the flow of a control signal ofthe apparatus 1 for cultivating plants according to an embodiment. FIG.49 is a view schematically illustrating an operating state of theapparatus 1 for cultivating plants according to an embodiment.

As illustrated in the drawing, the seed package 90 may be mounted on thebed 50, and water in the water tank 40 may be supplied to the bed 50 ina constant amount. In addition, nutrient solution contained in the seedpackage 90 may be supplied to plants inside the seed package 90 togetherwith water supplied to the bed 50.

The light assembly 60 may irradiate light toward the plant growing inthe bed 50 through operation of the light assembly 60. The lightassembly 60 may be turned on and off for an appropriate time perioddepending on a growth condition and environment of the plant. The lightassembly 60 may be turned on and off according to an actual amount ofsunlight according to a season, thereby providing an environment similarto that in which the plants in the apparatus 1 for cultivating plantsgrow in an external natural environment.

Plants in the bed 50 may be subject to photosynthesis by the lightprovided by the light assembly 60, and receive a required amount ofcarbon dioxide through the supply duct 17 in this process. Inparticular, CO₂ may be supplied to the cultivating space using thecondenser fain 34 without an additional dedicated fan. The air in thecultivating space 11 may be recovered to the machine compartment 12 andmay be circulated between the machine compartment 12 and the cultivatingspace 11.

When the internal temperature of the cultivating space 11 is excessivelylow, the heater 102 may be driven. When the internal temperature of thecultivating space 11 is excessively high, the cooling cycle may bedriven and the evaporator 31 cooled.

The air heated or cooled by the heater 102 or the evaporator 31 may bedischarged forward through the blower assembly 80. In this case, the airmay flow forward from the rear end portion of the light assembly 60, andthe bottom surface of the light assembly 60 may be cooled during the airflow.

The air flowing forward may move downward and then flow from the frontend portion of the bed 50 to the rear end portion of the bed 50. A stemand leaf of the plant growing in the bed 50 may be shaken by the flow ofair flowing from the top surface of the bed 50, thereby significantlyimproving a state of the plant to be cultivated.

The air introduced into the rear end portion of the bed 50 may passthrough the space in which the evaporator 31 and the heater 102 aredisposed and may be discharged toward the light assembly 60 by theblowing fan 82.

The air flowing by the driving of the air blowing fan 82 may circulateinside the cultivating space 11. In this circulation process, the lightassembly 60 may be air-cooled and growth of the plant on the bed 50 maybe promoted.

The air passing through the evaporator 31 and the heater 102 may beheated or cooled during repeated air circulation, and the inner portionof the cultivating space 11 may be continuously and uniformly heated andcooled. Accordingly, the entire portion of the cultivating space 11 maybe maintained to a preset or predetermined temperature.

Various embodiments may be possible in addition to the above-describedembodiments. For example, the cabinet may have a vertically longstructure, and a larger number of beds and light assemblies may beprovided.

Hereinafter, additional embodiments will be described with reference tothe drawings. In these embodiments, the same or like reference numeralsare used for the same or like elements as those of the previousembodiment, and repetitive discussion has been omitted.

FIG. 50 is a view illustrating internal structure of an apparatus 1 forcultivating plants according to another embodiment. As illustrated inthe drawing, the apparatus 1 for cultivating plants according to thisembodiment has a long structure in the vertical direction. Thecultivating space 11 is formed inside the cabinet 10 and a plurality ofbeds 50 and light assemblies 60 corresponding to the beds 50 may beprovided.

In addition, the water tank 40 may be provided at the front most portionof the lowest portion of the cabinet 10, a water supply assembly, suchas the valve of a pump 494, may be disposed at the rear portion, themachine compartment 12 divided by a partition may be provided at therear portion of the water supply assembly, and the compressor 32 may bedisposed inside the machine compartment 12.

The plurality of beds 50 and the light assembly 60 may be providedinside the cultivating space 11. Only the light assembly 60 is providedon an uppermost surface of the cultivating space 11, and the bed 50 atthe lowermost portion of the cultivating space 11 may be configured tocover the water tank 40 and the pump 494. The light assembly 60 and thebed 50 may be disposed in a vertical direction in the space between theuppermost portion and the lowermost portion of the cultivating space 11.

In addition, a length of the cabinet 10 may be increased. In this case,when the evaporator 31 and the heater 102 are provided only at any oneside, the entire inner portion of the cabinet 10 may not be cooled orheated. Accordingly, the blower assembly 80 may be provided on the rearside of the space between the bed 50 and the light assembly 60 above.The evaporator 31 and the heater 102 may be subsequently disposed in therear portion of the blower assembly 80. The evaporator 31 and the heater102 may be formed in each space formed by the bed 50 and the lightassembly 60. Even in the situation that the length of the cabinet 10 isincreased, each space of the bed 50 may be effectively maintained to aset temperature due to the above-described structure.

A plurality of heaters 102 and evaporators 31 may be provided in therespective spaces to independently adjust temperatures of thecorresponding spaces. Accordingly, the spaces defined by the beds 50 maybe maintained at different temperatures, thereby providing an optimaltemperature environment suitable for various plants.

Embodiments disclosed herein provide an apparatus for cultivatingplants, in which carbon dioxide may be efficiently supplied andcirculated in a cultivation space. Embodiments disclosed herein furtherprovide an apparatus for cultivating plants, having a simple externalappearance and internal configuration because a configuration forsupplying carbon dioxide is not exposed to the inside and outside.

Embodiments disclosed herein provide an apparatus for cultivatingplants, that may increase productivity and reduce manufacturing costsbecause a configuration for supplying carbon dioxide is simple.Embodiments disclosed herein also provide an apparatus for cultivatingplants, that may supply carbon dioxide into a cultivation space using asafe structure.

Embodiments disclosed herein may include a supply duct that connects acultivation space and a machine compartment such that air in the machinecompartment is supplied to the cultivation space, and a return duct thatreturns air in the cultivation space to the machine compartment so thatair including carbon dioxide may be continuously supplied. The air ductmay have an inlet open toward a discharge side of a condenser fan, sothe air in the machine compartment may be forcibly supplied when thecondenser fan is operated. The inlet may be open toward blades of thecondenser fan.

The return duct may be disposed vertically under an evaporator disposedon a rear wall surface of the cultivation space. The return duct mayhave an outlet disposed at a discharge side of the condenser fan and maybe open toward a bottom of the machine compartment, so air in thecultivation space may flow into the machine compartment.

An outlet of the supply duct may be disposed closer to a blower assemblythan an inlet of the return duct. The outlet of the supply duct may beopen on the rear wall surface in the apparatus and may be closed at afront by the blower assembly.

The outlet of the supply duct may be open toward an inlet of the blowerassembly. The inlet of the air duct and the outlet of the return ductmay be open so as cross each other.

The supply duct may extend to the machine compartment through a spacebetween an inner case and an outer case. The supply duct may have a ductupper portion that passes between the inner case and the outer case anda duct lower portion that passes under the machine compartment. Afrontward-rearward width of the duct upper portion may be formed smallerthan a frontward-rearward width of the duct lower portion, andcross-sectional areas of the duct upper portion and the duct lowerportion may be the same.

The apparatus for cultivating plants according to an embodiment may haveat least the following advantages.

According to embodiments disclosed herein, a supply duct and a returnduct that connect a cultivation space and a machine compartment may beprovided, so carbon dioxide may be continuously supplied by circulatingair between the machine compartment and the cultivation space, wherebyit is possible to promote growth of plants. Further, the inlet of thesupply duct may be disposed at a discharge side of a condenser fan, sothat air in the machine compartment may be forcibly supplied to thecultivation space when the condenser fan is operated. That is, there isthe advantage that it is possible to effectively supply carbon dioxidewhen the condenser fan is operated, without a separate fan or controllerfor supplying carbon dioxide. There is the advantage that it is possibleto improve productivity and remarkably reduce manufacturing coststhrough this structure.

Further, the outlet of the supply duct may be disposed adjacent to theblower assembly, so it is possible to effectively supply the air flowingin the cultivation space from the machine compartment into the entirecultivation space. Accordingly, there is the advantage that efficiencyof supplying carbon dioxide may be improved.

Furthermore, the outlet of the return duct may be open toward the bottomof the machine compartment, so air in the cultivation space may beeffectively discharged to the machine compartment by negative pressuregenerated by airflow when the condenser fan is operated. Accordingly,there is the advantage that air for supplying carbon dioxide may be moreefficiently circulated.

The outlet of the supply duct may be covered by the blower assembly, andthe inlet of the supply duct and the outlet of the return duct may bepositioned in the machine compartment, so that the external appearancemay be further improved by preventing exposure of the supply duct andthe return duct at any place inside and outside the apparatus forcultivating plants.

As it is possible to supply carbon dioxide using the air in the machinecompartment without a separate configuration, such as a tank, there isthe advantage that it is possible to secure safety and operationreliability. Also, as the supply duct and the return duct are disposedbetween the inner case and the outer case, there is the advantage that aloss of the cultivation space may be prevented.

It will be understood that when an element or layer is referred to asbeing “on” another element or layer, the element or layer can bedirectly on another element or layer or intervening elements or layers.In contrast, when an element is referred to as being “directly on”another element or layer, there are no intervening elements or layerspresent. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items.

It will be understood that, although the terms first, second, third,etc., may be used herein to describe various elements, components,regions, layers and/or sections, these elements, components, regions,layers and/or sections should not be limited by these terms. These termsare only used to distinguish one element, component, region, layer orsection from another region, layer or section. Thus, a first element,component, region, layer or section could be termed a second element,component, region, layer or section without departing from the teachingsof the present invention.

Spatially relative terms, such as “lower”, “upper” and the like, may beused herein for ease of description to describe the relationship of oneelement or feature to another element(s) or feature(s) as illustrated inthe figures. It will be understood that the spatially relative terms areintended to encompass different orientations of the device in use oroperation, in addition to the orientation depicted in the figures. Forexample, if the device in the figures is turned over, elements describedas “lower” relative to other elements or features would then be oriented“upper” relative to the other elements or features. Thus, the exemplaryterm “lower” can encompass both an orientation of above and below. Thedevice may be otherwise oriented (rotated 90 degrees or at otherorientations) and the spatially relative descriptors used hereininterpreted accordingly.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the invention. Asused herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprises”and/or “comprising,” when used in this specification, specify thepresence of stated features, integers, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or groups thereof.

Embodiments of the disclosure are described herein with reference tocross-section illustrations that are schematic illustrations ofidealized embodiments (and intermediate structures) of the disclosure.As such, variations from the shapes of the illustrations as a result,for example, of manufacturing techniques and/or tolerances, are to beexpected. Thus, embodiments of the disclosure should not be construed aslimited to the particular shapes of regions illustrated herein but areto include deviations in shapes that result, for example, frommanufacturing.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art andwill not be interpreted in an idealized or overly formal sense unlessexpressly so defined herein.

Any reference in this specification to “one embodiment,” “anembodiment,” “example embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment. The appearances ofsuch phrases in various places in the specification are not necessarilyall referring to the same embodiment. Further, when a particularfeature, structure, or characteristic is described in connection withany embodiment, it is submitted that it is within the purview of oneskilled in the art to effect such feature, structure, or characteristicin connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. An apparatus for cultivating plants, comprising:a cabinet having a cultivation space; a door that opens and closes thecultivation space; at least one bed disposed in the cultivation spaceand on which plants are cultivated; at least one light assembly thatradiates light toward the at least one bed for photosynthesis; a watertank that stores water to be supplied to the at least one bed; anevaporator provided in the cultivation space at an inner rear wall ofthe cabinet; a machine compartment separated from the cultivation spaceat a lower portion in the cabinet, that communicates with an outside ofthe apparatus, and that accommodates a compressor and a condenser; atleast one blower assembly disposed between the at least one lightassembly and the at least one bed, wherein an outlet that discharges airtoward a bottom surface of the at least one light assembly is formed atan upper end of the at least one blower assembly, and an inlet thatsuctions air from a top surface of the at least one bed is formed at alower end of the at least one blower assembly; a fan disposed in themachine compartment to suction external air of the apparatus into themachine compartment and force the air to flow inside of the machinecompartment; an air duct that connects the machine compartment and thecultivation space and guides air in the machine compartment to thecultivation space; and a return duct that connects the cultivation spaceand the machine compartment and guides air in the cultivation space tothe machine compartment, wherein an inlet of the air duct is disposedadjacent to the fan in a discharge direction of the fan, and theexternal air suctioned into the machine compartment flows into the inletof the air duct when the fan rotates to be supplied to the cultivationspace after passing through the machine compartment where the externalair exchanges heat with the condenser and the compressor.
 2. Theapparatus of claim 1, wherein the air duct is disposed closer to the atleast one blower assembly than the return duct.
 3. The apparatus ofclaim 1, wherein an outlet of the air duct is open toward the inlet. 4.The apparatus of claim 1, wherein an outlet of the air duct is disposedon a rear wall surface of the cultivation space.
 5. The apparatus ofclaim 4, further comprising: wherein the at least one blower assembly isdisposed upstream of the outlet of the air duct and covers the outlet.6. The apparatus of claim 1, wherein an inlet of the return duct isdisposed on a floor of the cultivation space that corresponds to a topsurface of the machine compartment.
 7. The apparatus of claim 1, whereinthe evaporator is disposed above the return duct.
 8. The apparatus ofclaim 7, wherein the return duct includes: a duct mount disposed on afloor of the cultivation space and having a slope such that a widththereof decreases downward; and a discharge pipe that extends through atop surface of the machine compartment from a lower end of the ductmount.
 9. The apparatus of claim 1, wherein the fan forcibly blows airfor heat exchange of the condenser.
 10. The apparatus of claim 1,wherein the inlet of the air duct is disposed in a blade area of thecondenser fan.
 11. The apparatus of claim 10, wherein an outlet of thereturn duct is formed to face a bottom surface of the machinecompartment.
 12. The apparatus of claim 10, wherein a fan guide thataccommodates the fan is disposed in the machine compartment, and whereinan outlet of the air duct extends in parallel to the fan guide.
 13. Theapparatus of claim 1, comprising: an inner case that forms an inner sidesurface of the cultivation space; an outer case spaced apart from theinner case and forming an external appearance of the cabinet; and aninsulating material that fills a space between the inner case and theouter case, wherein the air duct extends to the machine compartmentbetween the inner case and the outer case.
 14. The apparatus of claim13, wherein the air duct includes: a duct upper portion that passesbetween the inner case and the outer case; and a duct lower portion thatpasses through a lower portion of the machine compartment, and wherein afrontward-rearward width of the duct upper portion is formed smallerthan a frontward-rearward width of the duct lower portion, andcross-sectional areas of the duct upper portion and the duct lowerportion are the same.
 15. The apparatus of claim 14, wherein the ductupper portion is formed in an elliptical shape and wherein across-section of the duct lower portion is formed in a circular shape.16. The apparatus of claim 15, comprising: a duct connecting portionformed to be inclined or rounded between the duct upper portion and theduct lower portion and connecting the duct upper portion and the ductlower portion.
 17. The apparatus of claim 1, wherein the return ductincludes: a duct mount disposed on a floor of the cultivation space andhaving a slope such that a width thereof decreases downward; and adischarge pipe that extends through a top surface of the machinecompartment from a lower end of the duct mount.